Kennametal - British Standard Pipe Taps Thread Size: 1/8-28 Thread Standard: BSPP

Solid carbide provides better rigidity than high speed steel. It is extremely heat-resistant and used for high speed applications on cast iron, nonferrous materials, plastics, and other tough-to-machine materials

Oxide, also known as black oxide or steam oxide, is a surface treatment that prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and ferrous metals.