E5246-40NO2 HSS Straight Flute Hand Tap, UNF, ISO Standard

Straight flute hand tap NO2 with a 4-6xP second lead, for Unified National Fine thread UNF 6 with 40 TPI and 2B class of fit, dimensions according to ISO 529 standard with 3.55mm shank and 2.8mm 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