Flat Washer 1)Standard:DIN,ANSI,BS, ... Stainless steel 4)Finish:Zinc,Black,Nickel,Tin Flat Washer 1)Standard:DIN,ANSI,BS,JIS,GB 2 ... :Steel,Stainless steel 4)Finish:Zinc,Black,Nickel,TinMetal Flat Washer1) Standard: DIN, BS, IFI, JIS, ... Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according ... ,quality second and price third. flat washer