E0231/2 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 1/2" with 13 TPI and 2B class of fit, dimensions according to ISO 529 standard with 9.0mm shank and 7.1mm 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