Lag Screw (DIN571) | THREAD Industrial Precision Cold-Formed Fasteners
THREAD INDUSTRIAL CO., LTD. manufactures high-tensile DIN 571 Lag Screws, engineered for robust and secure fastening in wood and heavy-duty timber applications. Also known as coach screws, these fasteners feature a hexagonal head for high-torque installation and a coarse thread for superior grip. Our production facilities in Taiwan and Vietnam ensure a consistent supply of premium lag screws, available in a wide range of sizes to meet diverse project requirements. We are a leading OEM/ODM supplier, committed to international quality standards. Choose THREAD Industrial for precision cold-formed fasteners, certified quality management, and drawing-based manufacturing support.
Lag Screw (DIN571)
DIN 571
DIN 571 Hex Head Lag Screws | Heavy-Duty Wood Fasteners Manufacturer
THREAD INDUSTRIAL CO., LTD. manufactures high-tensile DIN 571 Lag Screws, engineered for robust and secure fastening in wood and heavy-duty timber applications. Also known as coach screws, these fasteners feature a hexagonal head for high-torque installation and a coarse thread for superior grip. Our production facilities in Taiwan and Vietnam ensure a consistent supply of premium lag screws, available in a wide range of sizes to meet diverse project requirements. We are a leading OEM/ODM supplier, committed to international quality standards.
High-Performance Fastening Solution
The DIN 571 Lag Screw is a heavy-duty wood screw designed for strong, reliable connections in structural timber, decking, landscaping, and other construction projects. Its hex head allows for greater torque application compared to standard screw heads, ensuring a secure and lasting hold. Manufactured from high-quality carbon steel with various plating options, our lag screws offer excellent durability and corrosion resistance.
Manufacturing Capabilities & Specifications
As a premier fastener manufacturer, THREAD INDUSTRIAL CO., LTD. leverages its advanced production capabilities across our Taiwan and Vietnam factories to deliver a comprehensive range of screws. We adhere to strict quality control processes, ensuring every product meets or exceeds industry standards.
Taiwan Factory Specifications
| Metric Size | Imperial Size |
|---|---|
| M2.9 ~ M6.3 | #4 ~ 1/4" |
| Length up to 200mm | |
Vietnam Factory Specifications
| Screw Type | Metric Size | Imperial Size |
|---|---|---|
| Drywall Screws | M3.5 ~ M5.5 | #6 ~ #10 |
| Chipboard Screws | M3.0 ~ M6.0 | #4 ~ #14 |
| Self Drilling Screws | M2.9 ~ M6.3 | #4 ~ #14 |
| Tapping Screws | M2.9 ~ M6.3 | #4 ~ #14 |
| Length up to 200mm for all types | ||
In addition to standard DIN 571 lag screws, we also specialize in manufacturing drywall screws, chipboard screws, self-drilling screws, and tapping screws, as well as customized fasteners based on client drawings.
Lag Screw (DIN571) Precision Cold-Formed Fastener
THREAD Industrial manufactures Lag Screw (DIN571) for automotive, industrial equipment, construction, infrastructure, and machinery applications, with production support from Taiwan and Vietnam.
Product requirements can include international standards, customer drawings, metric or imperial sizes, carbon or alloy steel, defined strength classes, and application-specific surface treatment.
IATF 16949 and ISO 9001 systems, accredited laboratory testing, controlled production, and optical sorting help buyers source consistent fasteners for quality-critical and repeat-order programs.