hub bolt 1) Wheel bolt: Grade 10.9 and 12.9 , HRC=34-37 Tensile strength: 1040N/mm 2) Finishing: zinc plated, phosphated. hub bolt,wheel bolt,wheel stud Specification:1) Grade: Ordinary standard 10.9(Or as required). 2) Material: (40CR)ASTM 5140 steel,35CrMo.3) Finishing: Black Oxide, Zinc Plated, Phosphate,Dacromet,ect. 4) Logo: 4) Packing:Neutral export carton box.(Or as required) Inner packing ...