Hex head bolts DIN933/DIN931 ISO4014/ISO4017 factory China

Standard: DIN931/DIN933 ISO4014/ISO4017 Grade: 4.8/6.8/8.8/10.9/12.9 Material:Low carbon steel/medium carbon steel/alloy steel Size:M6-M45; 1/4“-3“ Finish: black/zinc plated/hot dip galvanized Mark: According to customer’s requirement #building #construction #build #c