* Permisable values forthread Class 4G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 3G (External)* Permisable values forthread Class 3G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4G (External)* Permisable values forthread Class 4G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!

* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

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* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it here

* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

For example, the maximum shaft diameter or the minimum hole diameter. • Least Material Condition (LMC): The least material condition of a feature of size is the ...

* Back to Thread Class Selection 1 - 5 ACME 4G (External)* Permisable values forthread Class 4G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

We will be happy to assist you with your calculations. Surface Feet Conversion Chart. Surface Feet Per Minute (SFM) to Revolutions Per Minute (RPM). RPM Cutter ...

The data listed below is valid only for Single Start Threads and engagement lengthsup to 2 For Multiple Starts and large LE's use our ACME Thread Calculator

* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

I have an Aluminum 6061 part with M4 threads. I designed it to use tapped threads, but is there any benefit to using inserts instead?

* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

Feb 17, 2021 — High-Speed Steel (HSS) is a popular material good for drilling into soft steels as well as wood and plastic. It's an economical solution for ...

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* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

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* Permisable values forthread Class 3G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4G (External)* Permisable values forthread Class 4G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

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* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

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* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

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* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Permisable values forthread Class 2G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3G (External)* Permisable values forthread Class 3G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4G (External)* Permisable values forthread Class 4G#DescriptionValue (Inch)Value (mm)dMajor Diameter0.99 - 125.146 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2C (External)* Permisable values forthread Class 2C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9965 - 125.311 - 25.4d2Pitch Diameter0.8726 - 0.89222.164 - 22.657d1Minor Diameter0.7509 - 0.7819.073 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks

* Back to Thread Class Selection 1 - 5 ACME 3C (External)* Permisable values forthread Class 3C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.9985 - 125.362 - 25.4d2Pitch Diameter0.8849 - 0.89422.476 - 22.708d1Minor Diameter0.7664 - 0.7819.467 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 4C (External)* Permisable values forthread Class 4C#DescriptionValue (Inch)Value (mm)dMajor Diameter0.999 - 125.375 - 25.4d2Pitch Diameter0.8895 - 0.89622.593 - 22.758d1Minor Diameter0.7703 - 0.7819.566 - 19.812PVaration of Pitch (+/-)0.00080.02αVaration of 14.5° anngle (+/-)0.45°* Back to Thread Class Selection 1 - 5 ACME 2G ( Internal)* Permisable values for thread Class 2G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3G ( Internal)* Permisable values for thread Class 3G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4G ( Internal)* Permisable values for thread Class 4G#DescriptionValue ()Value ()DMajor Diameter1.02 - 1.0425.908 - 26.416D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.8 - 0.8120.32 - 20.574PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 2C ( Internal)* Permisable values for thread Class 2C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.919422.86 - 23.353D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 3C ( Internal)* Permisable values for thread Class 3C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.004525.425 - 25.514D2Pitch Diameter0.9 - 0.909122.86 - 23.091D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection 1 - 5 ACME 4C ( Internal)* Permisable values for thread Class 4C#DescriptionValue ()Value ()DMajor Diameter1.001 - 1.00325.425 - 25.476D2Pitch Diameter0.9 - 0.906522.86 - 23.025D1Minor Diameter0.82 - 0.8320.828 - 21.082PVaration of Pitch (+/-)0.0008 (Ref)0.02 (Ref)αVaration of 14.5° anngle (+/-)0.45 (Ref)11.43 (Ref)* Back to Thread Class Selection Over Wire Measurements for 1-5 ACME* OverWire is a measuring method to obatin the pitch diameter of threads. It is mostly used when a manufacturer does not have a Go/Nogo gauge for a thread. You can learn more about it hereInchmmPermissible Wire Diameter Range0.09813 - 0.154942.4924 - 3.9353Ideal Wire Diameter0.103292.6236Possible WiresFrom Standard Sets* 0.10497* 0.11547* 0.1283* 0.14434* 2.5981* 2.8868* 3.1754* 3.4641Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out!Our Top Picks