WheelStud for ROR 21018490 Characteristics: 1.Quality:10.9;12.9 2.Surface:Phosphated,Black oxide,Dacromet 3.Materials:1045/5140/35CrMo 4. HRC: 36-39 5. Tensile stength: 1172N/mm2 6. Pack unit: 5pcs/box 7. OEM No.: 21018490 8. We can make products strictly according to client's requirement(drawing and samples)