... : DIN125A, DIN9021, BS4320A/B/C Washer1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI,ASME,Non-Standard2) Size: M3–M763) Material: Carbon ... , Zinc Yellow, Black, Nickel-plating, Tin-plating, Chrome- plating, Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved ...