Spiral point tap with chamfer form B with a 3.5-5xP second lead, for Unified National Fine thread UNF 7/8" with 14 TPI and 3B class of fit with H4 pitch diameter limits, dimensions according to ANSI standard with 0.6970" shank and 0.5230" square drive, powder metallurgical HSS-E with steam tempered surface finish for 2.5xD through hole threading in general purpose applications
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Primary use
M - Stainless steel(corrosion resistant steels with ? 11% chromium content) - Possible use
K - Cast Iron(castings of iron and carbon alloys with > 2% carbon content) - Possible use
For additional details please check the Manufacturer's site:
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