EP207/8 UNC Machine Tap Spiral Point

Spiral point tap with chamfer form B with a 3.5-5xP second lead, for Unified National Coarse thread UNC 7/8" with 9 TPI and 2B class of fit, dimensions according to DIN 2184-1 standard with 18.0mm shank and 14.5mm 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