... )Material:Steel,Stainless steel 4)Finish:Zinc,Black,Nickel,TinMetal Square Washer1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI, ... , Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according to your request.6 ... us.9) Working Process Include: cold punching, and machining, also CNC machine, can do OEM order.10) Experience: we have over than ...