High strength hexagon bolt with nut DIN931/933 Class: 10.9, 12.9 grade Material: 20MnTiB, 40CR CE certifation Standard:GB/T 1228-1231,ISO7412,DIN6914-6916,ASME B 18.2.6 (ASTMA325,A490), JISB1186 AS1252Grade:8.8S, 10.9S , Size:M12-M36 Material:Carbon Steel,Alloy SteelSpecifications Size from: M5 - M42 Length: 10mm-200mm Hexagon head bolt: Treatment: HDG, Zinc, Black... Carbon steel: Grade/class 4. ...