Description
Spiral flute tap with chamfer form C with a 2-3xP semi-bottoming lead, for Unified National Coarse thread UNC 1″ with 8 TPI and 3B class of fit with H4 pitch diameter limits, dimensions according to ANSI standard with 0.8000″ shank and 0.6000″ square drive, powder metallurgical HSS-E with bright finish and 45 Degree helix angle for 2.5xD blind hole threading in free machining and plain carbon steel and wrought or cast aluminium.
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