machine screw 1.material:stainless steel,carbon steel 2.over 10 years supplier 3.ROHS,SGS certification 4.free sample,delivr Cross recessed flat head galvanized machine screw fine/coarse thread (DIN/AISI standard) A: SpecificationMaterial:stainless steel,copper,steel,aluminum,copperSurface Finish:nickel plated,white zinc,black zinc,color zinc,black oxideThread:metric and inch sizeStandard:DIN,ISO ...