... heat treatment is Grade 10.9 45 Steel after heat treatment is Grade 8.84—Finishing ... new Models following your drawingsteel u bolt,bolt and nuts,Wheel hub bolt,Auto tools manufacturer in China ... Origin:Hejian,China3)Brand Names: FUZHONG/wheel bolt Series4)High quality strength:grade8.8,9.8 ... 0mm8)Thread :UNF / metric thread9)Material:mild steel,1035steel,1045steel,5140steel,A3,45steel,40Cr10)Shape:round, ...