1.Certificate: ISO9001:2000 2.U bolt for European&Japanese heavy trucks 3.High stre1ngth & technical heat treatment 1. High Quality: grade 8.8, 10.9 and 12.92. Material: 45# steel,40Cr steel, 35CrMo steel.Cr = Chrome Mo = Molybdenum45# steel = SAE1045 steel = CK45 steel40Cr steel = SAE 5140 steel40Cr steel with heat treatment is grade 10.935CrMo steel with heat treatment is grade 12.93. Finishing ...