Our high-quality automobile bolts are designed to meet the demanding needs of the automotive industry. Manufactured with precision and durability in mind, these automobile bolts are ideal for a wide range of applications, from engine assembly to bodywork. Made from premium materials, they offer superior strength, corrosion resistance, and long-lasting performance. Whether you’re restoring a classic car or working on modern vehicles, our bolts provide the reliability you can trust for every project.
Raw Material Selection
High-strength steel wire rods (e.g., carbon steel, alloy steel, or stainless steel) are selected based on the required mechanical properties and application.
Wire Drawing & Cutting
Steel wires are drawn through dies to reduce to the desired diameter, then cut into precise lengths for each bolt size.
Cold Heading / Forging
The bolt head is formed using high-speed cold forging machines. This process increases the material’s strength through strain hardening.
Thread Rolling
Threads are formed by rolling rather than cutting, which, in turn, enhances thread strength and improves fatigue resistance.
Heat Treatment
Bolts undergo heat treatment, including quenching and tempering, to achieve the required hardness, strength, and toughness, ensuring optimal performance under stress.
Surface Treatment
Various coatings are applied to improve corrosion resistance and appearance, including:
- Zinc plating (blue/white/yellow)
- Dacromet coating
- Phosphate coating
- Black oxide
Inspection and Testing
We perform dimensional checks, hardness testing, tensile strength testing, and thread gauging to ensure quality. Additionally, some bolts undergo fatigue and salt spray tests for further durability assessment.
Sorting and Packaging
Automatic optical sorting machines ensure 100% defect-free output. Bolts are then packaged and labeled for delivery.
Customized Solutions: Our CNC bolts offer tailored non-standard customization to meet specific requirements, ensuring a precise fit for unique applications. This product is ideal for users who need bespoke fasteners for their projects.
Durable Materials: The product is available in various materials, including steel, aluminum, copper, and stainless steel, providing a durable and long-lasting solution for general industry applications.
Multi-Functional: The CNC bolts cater to different needs by offering various head types and surface treatments, such as zinc plating and plain finish, to suit diverse user preferences and requirements.
