... some special conditionssizeCustomized size and spec /OEM availableWe are specializing in manufacturing all kinds of precision machinery parts.1. All kinds ... C52100, C54400, etc5. Iron: 1213, 12L14,12156. Aluminum: Al6061, Al60637.OEM according to your requestProducts Availablebolts, screws, nuts, rivets, stem nuts ... 2007. Any question, please feel free to contact us. Precision steel stamping part