Description
Combination drill-tap with a 27° spiral flute, for National Pipe Taper thread NPT 3/4″ with 14 TPI and Normal class of fit, dimensions according to ANSI standard with 0.9060″ shank and 0.9060″ square drive, HSS with bright finish and 27° helix angle for 1.5xD through or blind hole threading in free machining steel
