The DIN571 Hex Head Wood Screw, also widely known as the coach screw or lag screw, is a heavy-duty fastening solution engineered for high-load timber and metal applications. Designed for superior grip and maximum pulling power, these screws feature a hexagonal head that allows for the application of high torque using a wrench, ensuring a secure and permanent bond in demanding structural environments.
Manufactured from premium carbon steel and available in various grades (4.8 to 12.9), our DIN571 screws are compatible with international standards including DIN, ISO, ANSI/ASTM, and JIS. Whether you are working on curtain walls, machine supports, or heavy-duty railings, these fasteners provide the exceptional shear strength and corrosion resistance required for long-term stability in both indoor and outdoor settings.
Detailed Parameters
| Material | Carbon Steel | Grade | 4.8, 8.8, 10.9, 12.9 etc. |
|---|---|---|---|
| Size Range | M6 - M12 | Standards | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS |
| Surface Finish | Plain, Black, Zinc Plated, HDG | Certification | ISO9001 |
| Heat Treatment | Tempering, Hardening, Spheroidizing, Stress Relieving | Process | Heading, Threading, Plating |
| Coating Thickness | Electroplate > 5μm / Hot Dip > 50μm | OEM Service | Available according to drawing or samples |
Key Advantages
High Strength
Available in high-tensile grades up to 12.9, ensuring maximum load-bearing capacity for heavy structures.
Corrosion Resistance
Advanced Hot Dip Galvanized (HDG) and Zinc plating options provide superior protection against rust.
Precision Threading
Accurate thread profiles ensure smooth installation and an airtight grip in natural stone and metal.
Versatile Application
Ideal for curtain walls, beam supports, machine brackets, and metal profiles across various industries.
Custom Engineering
Full OEM support for non-standard sizes based on your specific technical drawings or physical samples.
Certified Quality
ISO9001 certified manufacturing process ensures consistency and reliability in every batch delivered.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of Anchor, Bolt, and Nut stock to ensure seamless supply chain efficiency.
Quality Assurance
Rigorous inspection at every stage from raw material to final plating and heat treatment.
Custom Orders
Dedicated platform for OEM requests, allowing fast turnaround from drawing to prototype.
Logistics Tracking
End-to-end shipping visibility for bulk fasteners delivered globally to construction sites.
Packaging Logic
Flexible packaging solutions tailored to customer requirements for safe long-distance transit.
Technical Support
Professional guidance on selecting the right fastener grade for specific load requirements.
Investment Return Comparison
| Feature | Standard Fasteners | Our DIN571 Series |
|---|---|---|
| Durability | Medium | Ultra-High (HDG Plated) |
| Installation Speed | Slow (Manual) | Fast (Wrench Compatible) |
| Load Capacity | Basic | Industrial Grade (Up to 12.9) |
| Lifespan | Short-term | Long-term Structural Life |
| Cost Efficiency | Low Value/Price | High ROI due to Low Maintenance |
Frequently Asked Questions
Coach screws, like the DIN571, have a hexagonal head that allows for much higher torque application using a wrench, making them suitable for heavy-duty structural work compared to standard pointed wood screws.
For outdoor use, we recommend Hot Dip Galvanized (HDG) finish combined with Grade 8.8 or higher for a balance of high tensile strength and maximum corrosion resistance.
Yes, we provide full OEM services. We can manufacture screws according to your specific technical drawings or samples to meet unique project requirements.
M12 screws are typically used for heavy-duty beam supports, machine installation, curtain wall brackets, and securing large timber frames to metal profiles.
Our manufacturing facility is ISO9001 certified, ensuring that every bolt, nut, and screw meets strict international quality and safety standards.
We utilize precision measurement tools to ensure electroplating is > 5μm and Hot Dip Galvanizing is > 50μm, providing a reliable barrier against environmental oxidation.
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