E0231 UNC Machine Tap Spiral Flute 45°

Spiral flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Coarse thread UNC 1" with 8 TPI and 2B class of fit, dimensions according to ISO 529 standard with 18.0mm shank and 14.0mm square drive, powder metallurgical HSS-E with steam tempered surface finish and 45° helix angle for 2.5xD blind hole threading in general purpose applications