1.Material:carbon steel,stainless steel 2.Finish:zinc,black 3.Grade:8.8,10.9,12.9 Hex bolt ... PictureNameHex Bolt (DIN933/931)HS code73181500Materialcarbon steel, mild steel, stainless steelFinishplain,black, zinc ... plated, hot-dip zinc, hot-dip galvanizing, black, dacrometGrade4.8,6. ...