Spiral point tap Red Shark with chamfer form B with a 3.5-5xP second lead, for Unified National Coarse thread UNC 1/2" with 13 TPI and 2B class of fit with H5 pitch diameter limits, dimensions according to DIN/ANSI standard with 0.3670" shank and 0.2730" square drive, powder metallurgical HSS-E with TiAlN-Top coating for 2.5xD through hole threading in plain carbon, alloy and tool steel.