Description
Combination drill-tap with a 30 Degree spiral flute, for Unified National Coarse thread UNC 10 with 24 TPI and 2B class of fit, dimensions according to DORMER-DIN standard with 5.0mm shank and 4.0mm square drive, HSS with steam tempered surface finish and 30 Degree helix angle for 1.5xD through hole threading in free machining steel.
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