... steel,Carbon steel. 3.OEM/ODM orders are welcome. the high-quality screw Products pictures : We specialized in producing all kinds of ... . 4) Finish: Anodized, Polishing, zinc plated , nickel plated , Chrome ,etc. 5) Diameter size: From 0.5mm to 500mm . 6) Product size ... : Customized size. 7) Tolerance: +/-0.005mm 8) Products Use: Used in electronics, lighting ...