Straight flute tap with chamfer form C with a 2-3xP plug lead, for National Pipe Taper thread NPT 1.1/2" with 11.5 TPI and Normal class of fit, dimensions according to ~ANSI B94.9 standard with 38.1mm shank and 28.6mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in alloy steel
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: