Straight flute tap with chamfer form C with a 2-3xP plug lead, for National Pipe Straight thread for Mechanical joints NPSM1/2" with 14 TPI and Normal class of fit, dimensions according to ~ANSI B94.9 standard with 17.5mm shank and 13.1mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in free machining and alloy steel and copper or copper alloys
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Primary use
K - Cast Iron(castings of iron and carbon alloys with > 2% carbon content) - Possible use
N - Non-ferrous metals(metals including alloys without an appreciable amount of iron) - Primary use
For additional details please check the Manufacturer's site: