Bolt Features: 1) spec:DIN931,DIN933,DIN85 2) Grade: 4.8, 6.8, 8.8, 10.9, 12.9 BoltFeatures:1) Standards: DIN, ANSI / ASME ... ' order3) Materials: carbon steel, alloyed steel4) Grade: 4.8, 6.8, 8.8, 10.9, 12.95) Finish: zinc plating, nickel plating, heat ...