E5365/16NO3 HSS Straight Flute Hand Tap, BSF, ISO Standard

Straight flute hand tap NO3 with a 2-3xP plug lead, for British Standard Fine thread BSF 5/16" with 22 TPI and Medium class of fit, dimensions according to ISO 529 standard with 8.0mm shank and 6.3mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in free machining steel and copper or copper alloys