H.S.S. 8-32 taps are hard to find. They are designed to tap holes for 8-32 precision tap threads. These 8-32 tap threads are used by knife and gun makers to create easy adjust threading, or to create a thread that is standardized.
Thread - 8-32
O.A.L. - 2.25"
Pilot Drill Needed = .134" (#29)