Carbon Steel Grade 12.9 Black Oxide Wheel Bolt Wheel Metal Bolt M6 M8
| Attribute | Value |
|---|---|
| Name | Metal Bolt |
| Standard | DIN, ASME, ANSI, ISO |
| Material | Steel |
| Place of Origin | China |
| Finish | Polish, Black, Galvanization, Passivation |
| Certificate | ISO9001:2008, ROHS |
Grade 12.9 screws are ultra-high-strength fasteners made from SCM435 alloy steel, featuring a minimum tensile strength of 1220Mpa and hardness of 39-44HRC. These bolts are primarily used in textile, hydraulic, injection molding, and mechanical industries.
The black oxide treatment forms a protective oxide film on the metal surface, providing rust prevention while eliminating reflections. This treatment is particularly suitable when strict appearance requirements aren't necessary.
Flange bolts combine a hexagonal head with an integrated flange, offering a larger support area than standard bolts. This design enables higher preload capacity and superior anti-loosening performance, making them ideal for automotive engines and heavy machinery applications.
| Automotive | Essential for high-strength applications including automotive engines, heavy-duty machinery, and bridge construction, valued for their superior anti-loosening performance. |
| Mechanical | Widely used in mechanical, electronic, automotive, and construction sectors for connecting various components, circuit boards, engines, and building structures. |
| Energy | Critical for connecting power generation equipment and transmission lines in the energy industry. |
| Architectural | Used in construction engineering, shipbuilding, and petrochemical industries to enhance structural integrity and equipment stability. |
| Aluminum | Offers excellent thermal and electrical conductivity but requires careful machining due to its soft nature. |
| Titanium | Requires EDM machining with deionized water to control heat during processing of this viscous alloy. |
| Steel | Strong material often machined with wire cutting machines for complex features, requiring heat management. |
| Brass | High tensile strength allows for easy machining but requires slower cutting speeds due to softness. |
- Flange design provides superior locking capability compared to standard bolts
- Thinner flange section allows slight deformation for more secure fastening
- Integrated flange eliminates the need for separate washers in many applications
- Critical for wheel hub safety, ensuring stable connection between wheels and vehicle
- Available in various configurations to match different vehicle requirements
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