Dormer General Purpose Spiral Flute Machine Taps - UN is only available to buy in quantities of 1
Product Information
Spiral flute machine tap with chamfer form C with a 2 - 3 x P semi-bottoming lead, for Unified National Coarse thread UNC 1/4in with 20 TPI and 2B class of fit, dimensions according to ISO 529 standard with 6.3mm shank and 5mm square drive, powder metallurgical HSS-E with uncoated surface finish and 45° helix angle for 2.5 x D blind hole threading in general purpose applications.