Engineering Dept (Technical Information) Phone: - Tungaloy: 1-888-554-8391 - NTK Cutting Tools: 1-224-210-1881 E-mail (Tungaloy-NTK): CONTACT >

Turning insertgrade chart

TUNGALOY-NTK AMERICA INC. 3726 N. Ventura Drive Arlington Heights, Illinois, 60004, U.S.A. Phone: +1-888-554-8394 Fax: +1-888-554-8392

Carbidegrade Chart

Chart showing the best drill to use when tapping new threads or pilot hole in wood:  Recommended Drill Size for Screw Threads

Chart showing conversions for fractional inches, letter/wire gauge, decimal inches, and metric:  Fractional/Decimal Equivalent Drill Sizes Chart