LONGZE DIN 6334 Hexagon Coupling Nuts, also recognized as Long Extension Nuts, are precision-engineered fastening components designed to provide deep thread engagement for the secure connection of two male threads, such as threaded rods. As a critical high-tensile node within the proprietary LONGZE GFM-WCR System, these nuts feature a standardized height precisely three times the nominal thread diameter (3 x d), ensuring maximum structural stability and superior load transfer.
Manufactured from high-grade carbon steel and premium stainless steel, our DIN 6334 series is optimized for demanding environments including suspension systems, heavy machinery mounting, and large-scale construction projects. By integrating strict concentricity checks and rigorous proof load testing, LONGZE guarantees a seamless alignment that prevents structural rod failure and ensures long-term reliability in global industrial applications.
Detailed Parameters
| Thread Range | M6 – M36 | Property Class | Class 6, 8, 10 |
|---|---|---|---|
| Height Logic | 3 x Diameter (Standard) | Materials | Carbon Steel / SS304 / SS316 |
| Thread Type | Metric Coarse (6H) | Surface Finishes | Zinc Plated / Hot Dip Zinc / Passivated |
| Special Coatings | Black Oxide / Moly / PTFE Coating | Precision Standard | DIN 6334 / GFM-WCR System |
| Testing Protocol | Concentricity / Salt Spray / Hardness | Customization | Custom Lengths (L) Available |
Key Advantages
Deep Thread Engagement
Height of 3d ensures maximum contact area between threads, drastically reducing the risk of stripping under high tensile loads.
Corrosion Resistance
Available in Cr3+ Zinc, Hot Dip Galvanized, and Stainless Steel to withstand harsh outdoor and marine environments.
Precision Alignment
Strict control of hex-to-bore perpendicularity prevents rod bending and ensures a straight, professional assembly.
Material Traceability
Integrated batch code systems provide full heat traceability, meeting the strictest global engineering auditing standards.
Anti-Seizing Tech
Specialized PTFE and Moly coatings prevent galling and seizing, specifically for high-temperature or stainless assemblies.
GFM-WCR Integration
Perfectly matched with DIN 975/976 rods and ISO 4032 nuts for a complete, factory-direct fastening solution.
Product Gallery
Management Platforms
Technical HUB
Centralized access to DIN 6334 dimensional matrices, data sheets, and CAD drawing support.
Pro Procurement
Direct factory-to-client pipeline for rapid RFQ processing and inventory management.
Surface Lab
Specialized coating selection platform to match specific environmental risk requirements.
QC Reliability Center
Comprehensive validation of thread concentricity and proof load to prevent structural failure.
Logistics Risk Control
Moisture-resistant reinforced packing and DDP duty calculations for global shipping.
Custom Engineering
Rapid prototyping for non-standard lengths, fine threads, or specialized marine alloys.
Investment Return Comparison
| Feature | Standard Market Nuts | LONGZE GFM-WCR System |
|---|---|---|
| Thread Engagement | Basic / Shallow | Deep (3x Diameter) High-Tension |
| Alignment Accuracy | Variable/Loose | Precision Concentricity Guaranteed |
| Corrosion Protection | Standard Zinc | Multi-Layer/Specialized Anti-Seize |
| Material Traceability | Limited/Batch only | Full Heat Traceability Database |
| Supply Reliability | Third-party Sourcing | Direct Factory-to-Site Integration |
Frequently Asked Questions
The DIN 6334 is a coupling nut with a much greater height (3 times the diameter), allowing it to connect two threaded rods securely with deep thread engagement, whereas a standard nut is designed to clamp a part against a surface.
We utilize custom-built concentricity gauges to verify thread axis alignment. Our "Red-Line Policy" ensures that any batch failing perpendicularity checks is rejected to prevent rod bending.
For marine environments, we recommend Stainless Steel A4-80 or Hot Dip Galvanized finishes. For extreme conditions, PTFE or Moly coatings are available to prevent galling and corrosion.
Yes, our machining center can produce custom lengths (e.g., L=50mm, 100mm) and fine threads. Please contact our technical department with your CAD drawings for a proposal.
All DIN 6334 nuts are packed in moisture-resistant reinforced drums or cartons, palletized with high-tension shrink wrap and corner protectors to ensure they arrive in perfect condition.
We maintain strategic stocks of common galvanized and stainless sizes. For high-volume or custom orders, lead times depend on the material; however, our GFM-WCR system optimizes production for rapid delivery.
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