• Combination drill-tap with a 30° spiral flute
• For Unified National Coarse thread UNC 10 with 24 TPI and 2B class of fit
• Dimensions according to Dormer Pramet standard with 5.0 mm shank and 4.0 mm square drive
• HSS with steam tempered surface finish and 30° helix angle for 1.5xD through hole threading in free machining steel