... ,GB 2)Size:M3-M76 3)Finish:Tin,Nickel,Chrome stainless steel lock washer1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI ... ,ASME,Non-Standard2) Size: M3–M763) Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass, Aluminum, etc.4) Finish: Zinc Clear, Zinc ... - plating, Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according to your ...