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 is your capacity of production?
We can produce more than 1500,000pcs bolts every month.
Q2 where is your factory location?
We are in rongqiao industrial area, liucheng street, nan’an, quanzhou, Fujian, china
Q3 how many heat treatment lines you have?
We have four advanced heat treatment lines.
Q4 what is your trade terms?
We can accept EXW, FOB, CIF and C&F.
Q5 how many countries you export?
We export to more than 100 countries.
Q6 do you offer customized service?
Yes, we can offer customized service, we can produce according to sample or drawings.