Dacromet Hexagonal Column Wheel Hub Bolts

Product introduction

Dacromet hexagonal hub bolt is a high-performance and high-reliability fastener specially designed for automobile wheel connection. Its core value is to provide double guarantee for vehicle driving safety: excellent corrosion resistance and solid mechanical connection. The bolt adopts Dacromet surface treatment process to form an extremely corrosion-resistant zinc-aluminum protective film. This protective film can effectively resist the corrosion of bolts by rain, snowmelt (road salt) and harsh environments, prevent disassembly difficulties caused by rust, greatly extend the service life, and is especially suitable for use in coastal and high-humidity areas. Structurally, it usually adopts an external hexagonal head design, which provides a larger force contact surface, making the tools (such as sleeves) bite more firmly during disassembly and assembly, and is less likely to slip and damage the bolt edges. Made with high-strength materials (common performance levels are 8.8, 10.9 and above), it ensures that it can withstand the huge alternating loads and pre-tightening forces generated by the wheel during operation, and prevent loosening and breakage.

 

Product features

1. Excellent corrosion resistance and durability: The core advantage lies in its Dacromet (chromium-free zinc-aluminum coating) surface treatment. This coating can provide 7-10 times higher rust resistance than traditional electro-galvanizing, and is especially effective in resisting the erosion of winter snowmelt (road salt), rain and humid atmosphere. This feature effectively avoids problems such as "seizure" and difficulty in disassembly of bolts caused by corrosion, significantly extends the service life, and ensures the convenience of long-term maintenance.

 

2. Extremely high mechanical strength and safety and reliability: As a key fastener of the wheel hub, its body is usually made of high-quality alloy steel and has a high strength grade (commonly grade 8.8, 10.9 or higher). This ensures that the bolts can withstand the complex alternating stress, impact load and extremely high pre-tightening force generated by the wheel during driving, fundamentally preventing elongation or breakage due to overload, and providing core protection for driving safety.

 

3. Excellent anti-clamping force and anti-loosening performance: The precisely designed thread and rod can produce stable and long-lasting clamping force after applying the specified torque. Precise thread manufacturing combined with correct installation torque can effectively resist vibration during vehicle operation, prevent nuts from loosening, and ensure the continued stability of the wheel hub connection.

 

4. Optimized anti-rotation design and installation convenience: The standard hexagonal head type provides the best match with standard socket tools, with a large contact surface and firm bite. This design makes the tool less likely to slip during disassembly and assembly, effectively avoiding rounded damage to the bolt's edges and corners, and greatly improving the convenience and efficiency of installation and maintenance.

 

Product application

1. Passenger car and commercial wheel hub fixing

Application scenarios: Original or replacement wheel hub bolts for all types of cars, SUVs, pickup trucks, light trucks and buses.

Application advantages: This is its core application. It can withstand complex loads and vibrations during vehicle driving, and its high strength and anti-loosening properties are the basic guarantee for wheel safety. Dacromet treatment can effectively resist the erosion of road salt and rainwater, prevent rust, and facilitate daily maintenance and tire replacement.

 

2. High performance and modified vehicles

Application scenarios: high-performance sports cars, off-road vehicles and modified vehicles that have undergone wheel hub upgrades.

Application advantages: Under harsh driving conditions (such as high speed, intense driving or complex road conditions), higher requirements for the strength and reliability of fasteners are required. The bolt's high-performance grade provides an extra safety margin to ensure a secure connection to the modified wheel hub.

 

3. Commercial fleet and public transportation

Application scenarios: regular maintenance and component replacement of buses, logistics transportation fleets, and taxis.

Application advantages: For operating vehicles, ease of maintenance and long life of components are crucial. The corrosion resistance brought by Dacromet coating reduces disassembly difficulties caused by rust, reduces maintenance costs and time, and improves attendance.

 

4. Special vehicles in highly corrosive environments

Application scenarios: vehicles in coastal areas, vehicles in areas where snow melting agents are frequently used in winter, and special operation vehicles in chemical industry parks.

 

Application advantages: In these highly corrosive environments, ordinary galvanized bolts will rust quickly, posing safety hazards. Dacromet treatment provides a long-term anti-corrosion solution for such harsh working conditions, ensuring safe connection throughout the vehicle's life cycle.

 

FAQ

Q: What is the core advantage of this wheel hub bolt?

A: The core advantage is the combination of "long-term rust prevention" and "high-strength safety".

Dacromet coating provides corrosion resistance several times better than ordinary galvanizing. It is especially resistant to erosion by road salt and rainwater, avoids rust, and facilitates disassembly. High-strength materials (such as grade 8.8 and grade 10.9) ensure that the bolts can withstand the complex alternating loads of the wheel, prevent fatigue fracture, and ensure driving safety.

 

Q: What should I pay special attention to when installing this bolt?

A: The two most critical points are “cleanliness” and “torque”:

Clean threads: Before installation, be sure to remove rust, mud and oil from the wheel hub mounting holes to ensure smooth thread engagement and avoid false torque. Use a torque wrench: You must use a torque wrench and tighten strictly in accordance with the torque value specified by the vehicle manufacturer. Insufficient torque will cause loosening, and excessive torque will cause the bolt to stretch or even break, causing serious accidents.

 

Q: Can this bolt be reused?

A: It is not recommended to reuse it multiple times. Hub bolts are important safety parts. Each tightening will produce a small amount of plastic deformation, and repeated use may result in a decrease in strength, insufficient clamping force, and the risk of breakage or loosening. It is recommended that if the bolts are found to be damaged, stretched or worn during tire replacement or maintenance, they should be replaced with new bolts immediately.

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