Description
Spiral flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Coarse thread UNC 12 with 24 TPI and 2B class of fit, dimensions according to ISO 529 standard with 5.6mm shank and 4.5mm 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
