Description
Straight flute hand tap NO1 with a 6-8xP taper lead, for left hand ISO-Metric thread M4 with 0.70 mm pitch and 6H class of fit, dimensions according to ISO 529 standard with 4.0mm shank and 3.15mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in free machining and plain carbon steel
