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 |
The coating technology on the surface of fasteners such as U-bolts is generally cold galvanized, which can lead to signs of rust after being used for more than 1 year. Once rusted, it will not only affect the appearance and appearance, but also affect the Its performance has a great impact on the use of the equipment, so in our use, we should pay attention to the following basic conditions to prevent rust.
First, let the surface of the U-bolt dry as much as possible so we can avoid a lot of it.
1. The attachment of dust or other metal material particles, in humid air, the attached condensed water and stainless steel screws, connect the two into a micro-battery, triggering electrochemical behavioral reactions, and the protective film is easily severely damaged, which is called electrochemical Analyze corrosion..
2. The stainless steel U-bolt has adhesion to the surface of organic juice, in the absence of water and oxygen to form an organic acid, the organic acid is a long corrosion on the surface of the metal material.
3. The adhesion of stainless steel U-bolts, alkali and salt-rich surfaces cause local corrosion of students.
4. In some polluted air (such as the atmosphere is rich in a large number of different sulfides, carbon oxides, nitrogen oxides in my country), uncondensed water forms the liquid point of sulfuric acid, nitric acid, and acetic acid, causing students to chemistry structural corrosion.
Q1: How many people in your company?
More than 200 people.
Q2: What else products you can make without wheel bolt?
Almost all kinds of truck parts we can make for you. Brake pads, center bolt, U bolt, steel plate pin, Truck Parts Repair Kits, casting, bearing and so on.
Q3: Do you have an International Certificate of Qualification?
Our company has obtained the 16949 quality inspection certificate, passed international quality management system certification and always adhere to automotive standards of GB/T3098.1-2000.
Q4: Can products be made to order?
Welcome to send drawings or samples to order.
Q5: How much space does your factory occupy?
It’s 23310 square meters.
Q6: What is the contact information?
Wechat, whatsapp, E-mail, mobile phone, Alibaba, website.