1,stamped stainless steel parts with polishing 2, more material available 3,customized sureface treatment 4 ... . Bronze: C51000, C52100, C54400, etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestMaterial thicknessfrom 0.1mm ... to 8mm or as requiredProducts Availablebolts, screws, nuts, rivets, stem nuts, shafts ...