OSG - 1/8-27 NPSF Thread, 4 Flute Standard Pipe Tap - 2-1/8" OAL, 3/4" Thread Length, 7/16" Shank Diam, Oxide Finish, High Speed Steel

High Speed Steel (HSS) provides good wear-resistance and can be used in general purpose applications for both ferrous and nonferrous materials.

Oxide, also known as black oxide or steam oxide, is a surface treatment that prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and ferrous metals.

Standard extension pipe taps are used for internal deep-hole drilling of pipes and pipe fittings. ideal for hard-to-reach-areas in general purpose applications..