hexagon socket screw M6-M16 Grade:4.8-10.9 Finish:black or zinc plated ect.. Package:carton with pallet 1.Namespecial screw2.standardDIN931/933/912/DIN603, ASTM,JIS,BS,Nonstandard bolt(according to your order),etc3.MaterialCarbon Steel,low carbon steel; medium carbon steel(1035/1045); Alloy carbon steel,ect4.Grade4.8-10.95.FinishZinc plated(Cr,6+);,Black,hot dipped galvanized; dacromet6.Size M6- ...