Spiral point tap with a 3-6xP second lead, for Unified National Coarse thread UNC 1/4" with 20 TPI and 3B class of fit with H3 pitch diameter limits, dimensions according to ANSI standard with 0.2550" shank and 0.1910" square drive, HSS with TiN coating for 2.5xD through hole threading in ferritic, martensitic and austenitic stainless steel, non-ferrous metals and Fe-based, Ni-based and Co-based high-temperature alloys
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Possible use
M - Stainless steel(corrosion resistant steels with ? 11% chromium content) - Primary use
K - Cast Iron(castings of iron and carbon alloys with > 2% carbon content) - Possible use
N - Non-ferrous metals(metals including alloys without an appreciable amount of iron) - Primary use
S - High-temperature alloys(superalloys with high temperature stength and corrosion resistant surpassing that of stainless steel) - Primary use
For additional details please check the Manufacturer's site:
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