Standard:GB ISO DIN Material:Carbon steel,Stainless steel,Cu,Al Our products are good ... Head width:24±0.2 turning parts1. Material: carbon steel, stainless steel, aluminum, copper, or according to the customer ... parts, brass turning parts. 3. Surface treatment: galvanized steel, nickel plating, chrome plating, phosphating, polishing, the surface ... and given the best attention. Carbon steel nuts