Description
Straight flute hand tap NO3 with a 2-3xP semi-bottoming lead, for British Standard Whitworth thread BSW 1/2″ with 12 TPI and Medium class of fit, dimensions according to ISO 529 standard with 9.0mm shank and 7.1mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in free machining and plain carbon steel and copper or copper alloys.
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