machine screw 1.material:stainless steel,carbon steel 2.over 10 years supplier 3.ROHS, ... fine/coarse thread (DIN/AISI standard) A: SpecificationMaterial:stainless steel,copper,steel,aluminum,copperSurface Finish:nickel plated,white zinc,black zinc ... M12length: <80mmOEM weclomeB. Features: Material1.Stainless Steel: SS201, SS303, SS304, SS316, SS410, SS4202,Steel:C45(K1045), C46(K1046),C203.Brass:C36000 ...