wheel hub bolt 1.Material:1045/5140/35CrMo 2.Grade 10.9/12.9 3.Surface:Galvanized(Yellow/Silver),Phosphated,Black oxide, wheel hub bolt1.Material:1045/5140/35CrMo2.Grade 10.9/12.9 3.Surface:Galvanized(Yellow/Silver),Phosphated,Black oxide,Dacromet wheel hub bolt