... Steel,Iron,Copper Standard; DIN,BS,JIS,ANSI,GB. OEM Security ScrewsSize; M12-M36 Or at your OptionsMaterial; Stainless Steel,Low ... Head / etc ) , Rivets (Semi-tubular / Tubular / Blind/ etc.) , Nuts (Hex socket insert / insert/ Hex/Flange/Notch/ Notch plus/ Broaching /etc.) , Thread ...