... Material:Steel,Stainless steel 4)Finish:Zinc,Black,Nickel,TinMetal Square Washer1) Standard: DIN, BS, IFI, JIS, ... Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according to your ... than 10 years of experiences in producing and supply washers, 80% of our products are exported to oversea ... first,quality second and price third square wave washer