English
DIN 6334 Hex Coupling Nuts are precision-engineered structural fasteners designed specifically for joining and extending threaded rods. Featuring an elongated hexagonal body, these coupling nuts provide a deep and secure engagement, effectively distributing mechanical loads over a larger surface area to ensure maximum stability and connection strength in heavy-duty industrial applications.
Manufactured from high-grade carbon steel and stainless steel, our coupling nuts adhere to strict DIN 6334 international standards. Whether used in complex construction frameworks, HVAC piping systems, or automotive machinery, these fasteners offer the perfect balance of tensile strength and corrosion resistance, making them an indispensable component for secure, adjustable, and long-lasting threaded junctions.
| Material Options | Carbon Steel / Stainless Steel | Standard Compliance | DIN 6334 |
|---|---|---|---|
| Strength Levels | 4.8, 8.8, 10.9, 12.9 / A2-70, A4-70, A4-80 | Size Range | M6 to M36 |
| Surface Finish | ZP, HDG, Black, Dacromet, etc. | Threading | Full Internal Precision Threading |
| Key Application | Threaded Rod Extension | Installation Tool | Standard Wrenches / Sockets |
| Certifications | ISO 9001, ISO 14001, ISO 45001 | Origin | Manufacturer Direct (Haosheng Fastener) |
The extended grip length ensures a deep engagement with mating threads, significantly increasing joint stability compared to standard nuts.
Crafted from high-strength graded steel with various corrosion-resistant coatings to withstand harsh environmental conditions.
Full-length precision-cut internal threads allow for maximum flexibility when joining rods of varying lengths.
Ideal for construction formwork, HVAC seismic bracing, machinery lead screws, and automotive stud repairs.
The standard hex design enables rapid installation and fine-tuned adjustments of the overall assembly length.
Full material traceability and international certifications ensure every piece meets rigorous engineering standards.
Deeply rooted in the fastener industry, serving over 10,000 global customers with precision hardware.
20,000 sqm facility with an annual output exceeding 60,000 tons of high-quality fasteners.
Certified under ISO 9001, ISO 14001, and ISO 45001 for quality, environment, and safety.
Proven track record exporting to 38 countries with expert handling of EU anti-dumping regulations.
Over 2,000 tons of hot-selling inventory available for immediate shipment to reduce project lead times.
Direct manufacturer supply eliminates intermediaries, ensuring the most competitive pricing in the market.
| Feature Comparison | Standard Nuts | DIN 6334 Coupling Nuts |
|---|---|---|
| Thread Engagement | Short / Limited | Deep / Extended |
| Load Distribution | Concentrated | Wide / Distributed |
| Joint Stability | Low to Moderate | High Structural Stability |
| Adjustment Range | Fixed / Minimal | Highly Adjustable |
| Structural Integrity | General Purpose | Industrial Grade / Heavy Load |
The primary difference is the length. DIN 6334 coupling nuts have an elongated body that allows two threaded rods to be joined together, whereas standard nuts are used to secure a bolt to a component.
For corrosive environments, we recommend Stainless Steel (A2 or A4 grades) or Carbon Steel with Hot-Dipped Galvanized (HDG) or Dacromet coatings for maximum rust protection.
Yes, our coupling nuts are available in strength levels up to 12.9, making them suitable for load-bearing structural steelwork and high-tension mechanical assemblies.
Ensure that both the nominal diameter (e.g., M12) and the thread pitch match the DIN 6334 specifications. Always verify the standard (metric vs imperial) before installation.
As a source factory, we fully support OEM/ODM customization, including non-standard lengths, specialized surface treatments, and custom packaging to meet project requirements.
For items in stock, delivery can be immediate. For customized production orders, the typical lead time is 30-35 days after receiving the deposit.
Hit enter to search or ESC to close
If you are interested in our products, you can choose to leave your information here, and we will be in touch with you shortly.
