cnc turning parts 1.machine screw size,M3-M36 2.carbon, ... plating, yellow passivation, gold passivation, galvanizing, satin, etc.2.Processing Method: cnc machining, turning, milling, drilling, grinding, broaching, welding and assembly.3 ... C27200(CuZn37), C28000(CuZn40)4.Bronze: C51000, C52100, C54400, etc5.Iron: 1213, 12L14,12156.Aluminum: Al6061, Al6063 SpecificationM3-M36ColorPlain, blue plated ...