H.S.S. 10-80 taps are very rare. They are designed to tap holes for 10-80 micro precision threads. These threads are used by knife and gun makers to create a maximum adjust threading, or to create a thread that is less prone to "back-out", a common issue with coarse threads.

Try a 10-80 thread on your next project and you'll never go back, or back-out again!!!

Thread - 10-80
Ground HSS
O.A.L. - 2.5"
Threading - 1.0"
Pilot Drill Needed = .178"


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