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Stainless Steel Coach Screws
DIN 571 Stainless steel coach screws are heavy‑duty hexagon head wood screws designed for high‑strength timber‑to‑timber and metal‑to‑timber fixings.
Manufactured with a coarse thread, they provide strong pull‑out resistance and reliable clamping in structural timber applications.
Applicable Standard
DIN 571 – Hexagon Head Coach Screws (Metric).
Material
- A2 Stainless Steel (304)
- A4 Stainless Steel (316)
Sizes
M5–M20.
Specific Features
- Hexagon head for high torque installation
- Partial coarse wood thread (approx. 0.6 × length)
Performance
- Heavy‑duty design for structural timber fixings
- Suitable for indoor and outdoor use
- Corrosion resistant stainless steel construction
Typical Applications
- Timber‑to‑timber fixings
- Fixing steel sections and brackets to timber
- Sleepers, fencing, decking and pergolas
- Structural timber assemblies
- Marine and coastal structures (A4 grade)
Installation Notes
Pilot drilling is recommended to prevent timber splitting.
Pilot hole guide:
- Softwood: approx. 50% of screw diameter
- Hardwood: approx. 75% of screw diameter
- Use with a suitable flat washer (DIN 125 or DIN 9021) to distribute load
Dimensions & Design
- Dimensions stated as diameter × length, measured from underside of head to point
- Stainless steel coach screws are manufactured to DIN 571; mechanical strength classes are not specified by the standard
| Product | Nominal Diameters | Typical Length Range (mm) | |
|---|---|---|---|
| M5 | 5 | 25–80 | |
| M6 | 6 | 25–140 | |
| M8 | 8 | 25–150 | |
| M10 | 10 | 40–240 | |
| M12 | 12 | 50–240 | |
| M16 | 16 | 60–150 | |
| M20 | 20 | Up to 300 |
Stainless Steel Coach Screws datasheet
(PDF, 672 KB)