... 2)Size:M3-M76 3)Material:Steel,Stainless steel 4)Finish:Zinc,Black,Nickel,Tin SpecificationsFlat Washer 1)Standard: ... –M763) Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass, Aluminum, etc.4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel-plating, Tin ... Dacromet,Mechanical Galvanizing, Hot-dip Galvanizing.etc.5) Shape: round , square , curved , taper, cup, bowl or according to your request.6 ...