E2251/4 UNC Machine Tap Straight Flute

Straight flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Coarse thread UNC 1/4" with 20 TPI and 2B class of fit, dimensions according to DIN 371 standard with 7.0mm shank and 5.5mm square drive, powder metallurgical HSS-E with bright finish for 1.5xD through or blind hole threading in free machining and plain carbon steel