Product Details
Our DIN 912 Hex Socket Head Cap Bolts are meticulously crafted to meet rigorous international standards, ensuring superior quality and interchangeability. The bolt is defined by its tall, cylindrical head, which houses a deep, precise internal hexagonal socket. This design is not only space-efficient but also allows for higher torque application compared to external drive fasteners, minimizing the risk of stripping or cam-out. Forged from high-strength carbon or alloy steel and heat-treated to property classes like 8.8, 10.9, and 12.9, these bolts possess the immense strength required for the most demanding structural and mechanical assemblies. The final Black Oxide Coating is a chemical conversion process that creates an integral protective layer of magnetite (Fe₃O₄) on the surface. This treatment provides mild corrosion and abrasion resistance, enhanced lubricity to prevent galling, and a sleek, matte black finish with minimal dimensional change, preserving the bolt’s critical tolerances.
Product Parameters
The technical specifications for our DIN 912 Black Oxide Hex Socket Head Cap Bolts are outlined below, ensuring they meet your precise application requirements.
| Parameter | Specification |
|---|
| Product Name | DIN 912 Hex Socket Head Cap Bolts |
| Standard | DIN 912 |
| Material | High-Strength Carbon Steel, Alloy Steel |
| Property Class / Grade | 8.8, 10.9, 12.9 |
| Surface Treatment | Black Oxide Coating |
| Head Style | Cylindrical Head |
| Drive Style | Internal Hex Socket (Allen) |
| Diameter Range | M3 – M64 |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
| Key Feature | High tensile strength with a non-reflective, corrosion-resistant finish |
| Application | Machinery, Tool & Die, Automotive, Heavy & General Industry |
Product Features
These DIN 912 bolts are engineered with distinct features that deliver superior performance and reliability in critical applications.
- Exceptional Tensile and Shear Strength: Available in high-property classes such as 10.9 and 12.9, these bolts are designed to withstand extreme tension and shear forces, making them indispensable for load-bearing joints and high-stress environments.
- High-Torque, Recessed Driving System: The internal hex socket drive allows for secure engagement with an Allen key, enabling the application of significant, controlled torque for maximum clamping force. This recessed design is ideal for applications where external access is limited.
- Professional Non-Reflective Finish: The Black Oxide coating provides a uniform, matte black finish that is both aesthetically pleasing and functional. It reduces glare and light reflection, a critical feature in optical assemblies and automated manufacturing environments.
- Preservation of Critical Dimensions: As a conversion coating, black oxide adds negligible thickness to the fastener. This ensures that the bolt’s precision threading and tight tolerances are maintained, making it perfect for high-precision machinery.
- Enhanced Lubricity and Wear Resistance: The coating offers inherent lubricity, which minimizes friction during tightening and reduces the risk of thread galling. This contributes to more consistent torque readings and extends the service life of both the bolt and the mating components.
Product Applications
The unique combination of strength, precision, and a functional finish makes our DIN 912 Black Oxide Hex Socket Head Cap Bolts a versatile solution across a multitude of industries. They are a fundamental component in the assembly of industrial machinery and automation equipment, used to secure machine frames, mount motors, and construct robotic arms. In the tool, die, and mold-making industry, their high strength is essential for building and securing jigs, fixtures, and injection molds that operate under immense pressure. The automotive sector relies on these bolts for critical engine, transmission, and chassis assemblies where resistance to vibration and high stress is vital. Furthermore, they are widely used in electronics and scientific instruments for securely mounting components and panels, and in prototyping and custom fabrication for their reliability and professional appearance.
