... :4.8,8.8,10.9,12.9 4.Material:Q235,45#,40Cr ASTM DIN GB Standard High strength 12.9 bolt grades with ... 1230 III. Usage:Supply to railway, highway, bridge, boiler with steel structure, industry workshop, high civil buildings, hoisting machinery and ... :1. Certificate 2. Various honorary certificates3. Product12.9 grade high strength bolts 4. Factory view figures:packaging factory view Testing equipments ...