Description
Spiral point tap with chamfer form C with a 2-3xP plug lead, for Unified National Fine thread UNF 1/4″ with 28 TPI and 2B class of fit, dimensions according to DIN 2184-1 standard with 7.0mm shank and 5.5mm square drive, powder metallurgical HSS-E with bright finish for 2.5xD through hole threading in free machining and plain carbon steel and wrought or cast aluminium and copper or copper alloys
