Description
Combination drill-tap with a 30 Degree spiral flute, for Unified National Fine thread UNF 5/8″ with 18 TPI and Medium class of fit, dimensions according to DORMER-DIN standard with 12.5mm shank and 10.0mm 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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