1.Material:Steel,brass, alloy etc 2.Standard :DIN, ISO,ANSI,IFI. 3.Size: ... 5.Finish:Zn,Ni,Gold,Si,Cu 1.Material:Steel,brass, alloy etc2.Standard :DIN, ISO,ANSI,IFI.3.Size:M1 ... ,Western UnionSupply Ability 60,000,000 pieces per month electrican clamp nut