Hub bolts are high-strength bolts that connect vehicles to the wheels. The connection location is the hub unit bearing of the wheel! Generally, class 10.9 is used for mini-medium vehicles, class 12.9 is used for large-sized vehicles! The structure of the hub bolt is generally a knurled key file and a threaded file! And a hat head! Most of the T-shaped head wheel bolts are above 8.8 grade, which bears the large torsion connection between the car wheel and the axle! Most of the double-headed wheel bolts are above grade 4.8, which bear the lighter torsion connection between the outer wheel hub shell and the tire.
| hardness | 36-38HRC |
| tensile strength | ≥ 1140MPa |
| Ultimate Tensile Load | ≥ 346000N |
| Chemical Composition | C:0.37-0.44 Si:0.17-0.37 Mn:0.50-0.80 Cr:0.80-1.10 |
| hardness | 39-42HRC |
| tensile strength | ≥ 1320MPa |
| Ultimate Tensile Load | ≥406000N |
| Chemical Composition | C:0.32-0.40 Si:0.17-0.37 Mn:0.40-0.70 Cr:0.15-0.25 |
Q1 what about your quality control?
We always test material, the hardness, tensile, salt spray and so to guarantee the quality.
Q2 what is your payment terms?
We can accept TT,L/C,MONEYGRAM,WESTERN UNION and so on.
Q3 can you offer free samples?
If we have stock samples, we can offer free samples, please pay express fee yourself.
Q4 can I visit your factory?
Yes, sincerely welcome to visit our factory.
Q5 what is the grade of hub bolt?
For truck hub bolt, usually it is 10.9 and 12.9
Q6 do you offer OEM service?
Yes, we can offer OEM service.
Q7 what is your MOQ?
It depends on products, usually hub bolt MOQ 3500PCS,center bolt 2000PCS,u bolt 500pcs and so on.