... etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws, nuts, rivets, stem ... yellow passivation, gold passivation, galvanizing, satin, etc.Processing Methodcnc machining, turning, milling, drilling, grinding, broaching, welding and ... order qty) 4. Customized size and spec /OEM availablePackagesuitable for sea and air transportation or as ...