COACH BOLT (LAG BOLT)
Known as lag bolts or lag screws or coach screws, these are among the toughest fasteners used in the industry. These extremely sturdy fasteners are usually used to connect heavy lumber or other heavy materials that bearing intensive loads. Their distinctive feature is their huge size with their starting size being approx. 20mm long and about 6mm thick. Lag screws have sharp lead thread points and are usually hex head.
COACH BOLT (LAG BOLT) DIN-571
📌 Overview
The Stainless Steel Coach Bolt (Lag Bolt) DIN 571 is a hexagonal head wood screw designed for heavy-duty fastening into timber, wood, and masonry (with plugs). Unlike machine bolts, DIN 571 has a coarse deep thread and a sharp tip that provides excellent grip in wooden structures.
Available in SS 304 (A2) and SS 316 (A4), these bolts are ideal for construction, carpentry, outdoor furniture, marine, and structural applications, where strength and corrosion resistance are essential.
✅ Key Highlights
📏 Standard: DIN 571 (ISO Equivalent)
🔘 Head Type: Hexagonal Head
🧵 Thread Type: Coarse Thread, Self-Tapping for Wood
⚙ Grades Available: SS304 (A2-70), SS316 (A4-70)
💪 Strength Class: 50–70 depending on material grade
🌊 Corrosion Resistance: Excellent, suitable for outdoor & marine use
📦 Size Range: Diameter M5 to M20 | Length 20mm to 300mm
📊 Technical Specifications
| Specification | Details |
|---|---|
| Standard | DIN 571 |
| Material | Stainless Steel SS304 / SS316 |
| Head Style | Hexagonal |
| Thread | Coarse Thread, Partially Threaded |
| Tip | Sharp / Pointed for Wood Penetration |
| Size Range | M5 – M20 |
| Length | 20mm – 300mm |
| Surface Finish | Natural / Passivated |
📍 Applications
✔ Timber Construction & Heavy Carpentry
✔ Wooden Beams, Frames & Roofing
✔ Outdoor Furniture & Decking
✔ Marine & Coastal Installations
✔ Masonry (with nylon plugs)
🏆 Why Choose Our Stainless Steel Coach Bolts?
✨ Designed for strong wood-to-wood & wood-to-masonry connections
✨ Rust & corrosion resistant – perfect for outdoor use
✨ Eliminates the need for nuts (threads directly into material)
✨ Available in bulk & custom sizes
✨ Manufactured as per DIN 571 quality standards
