... :M3-M76 3)Finish:Tin,Nickel,Chrome round head washer stainless steel screw1) Standard: DIN, BS, IFI, JIS, ISO,GB,ANSI,ASME ... ,Non-Standard2) Size: M3–M763) Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass, Aluminum, etc.4) Finish: Zinc Clear, Zinc Yellow ... .9) Working Process Include: cold punching, and machining, also CNC machine, can do OEM order.