... steel sheet or tube),stainless steel,copper ,brass,aluminum,etc4.Finish:zinc plated,chromated plated, Electrophoresis, ... C52100, C54400, etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws ... passivation, gold passivation, galvanizing, satin, etc.Processing Methodcnc machining, turning, milling, drilling, grinding, broaching, welding and ...