Helical

Plug Tap Three to five threads chamfered for general use when tapping into the bottom of the hole is not critical. (This is the most widely used style)

HarveyTool

About Viking Drill and Tool Viking Drill and Tool begins with the finest tool steel we can buy and ends with the world class products in our catalog. Our cutting tools are designed, engineered and superbly crafted to provide long lasting durability.