... :DIN,ANSI,BS,JIS,GB 2)Size:M3-M76 3)Material:Steel,Stainle metal washers, stainless steel washers1) Standard: DIN, BS, IFI ... ) Size: M3–M763) Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass, Aluminum, etc. 4) Finish: Zinc Clear, Zinc Yellow, Black, Nickel ...