... Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws, nuts, rivets ... , gold passivation, galvanizing, satin, etc.Processing Methodcnc machining, turning, milling, drilling, grinding, broaching, welding ... precision fittings and fasteners in china with the high quality and low price .Mainly processing and manufacturing various kinds of metal parts ...