E0217/8 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 ISO 529 standard with 16.0mm shank and 12.5mm square drive, powder metallurgical HSS-E with steam tempered surface finish for 2.5xD through hole threading in general purpose applications