DIN 6921 is an international standard for hexagon bolts with flanges, designed for high-tensile structural bolting. These bolts are widely used in construction, automotive, and machinery industries where high strength, stability, and resistance to loosening are required. The integrated flange acts as a built-in washer, providing a wider surface area to distribute loads evenly and reduce stress concentration.
Key Features
✅ Hexagon Head with Integrated Flange
- Eliminates the need for a separate washer.
- Provides better load distribution, reducing pressure on the contact surface.
✅ High-Tensile Strength
- Typically made from high-strength steel (minimum tensile strength of 10.9).
- Offers exceptional durability and reliability in demanding applications.
✅ Vibration Resistance
- The flange helps prevent loosening caused by vibrations.
- Ideal for applications requiring long-term stability.
✅ Material and Surface Coating Options
- Carbon Steel (Grade 8.8, 10.9, 12.9) – For high-load applications.
- Stainless Steel (A2, A4) – For corrosion resistance in harsh environments.
- Coatings Available: Zinc-plated, hot-dip galvanized, black oxide, and phosphate coatings for enhanced durability.
✅ Industry Applications
- Construction & Infrastructure – Used in steel structures, bridges, and heavy-duty frameworks.
- Automotive Industry – Ensures secure fastening in vehicle chassis and engine components.
- Machinery & Equipment – Provides a high-strength connection in industrial machinery.
- Renewable Energy & Offshore – Suitable for wind turbines, solar structures, and marine applications.
DIN 6921 Standard Specifications
| Property | Specification |
|---|---|
| Head Type | Hexagon with Flange |
| Thread Type | Metric (Coarse & Fine) |
| Strength Classes | 8.8, 10.9, 12.9 (for high-strength applications) |
| Surface Treatment | Zinc-plated, Hot-dip galvanized, Black oxide, Phosphate, etc. |
Why Choose Our DIN 6921 Hexagon Bolts?
✔ Manufactured to the highest quality standards for maximum strength and durability.
✔ Extensively tested for tensile strength, impact resistance, and corrosion protection.
✔ Available in various materials, sizes, and finishes to meet your specific application needs.
✔ Bulk and custom orders available with fast delivery and competitive pricing.
📞 Contact us today for all your high-tensile structural bolting requirements!
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