Spiral point tap with chamfer form B with a 3.5-5xP second lead, for Unified National Coarse thread UNC 12 with 24 TPI and 3B class of fit with H3 pitch diameter limits, dimensions according to ANSI standard with 0.2200" shank and 0.1650" square drive, powder metallurgical HSS-E with bright finish for 2.5xD through hole threading in free machining and plain carbon steel and wrought or cast aluminium and copper or copper alloys
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Primary use
N - Non-ferrous metals(metals including alloys without an appreciable amount of iron) - Primary use
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