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The Range£7.45Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated Ce - M12 X 80 (Box Of 25) - White
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Unifix Coach Screws are heavy-duty fasteners specifically designed for robust wood-to-wood applications where high holding power is required. Ideal for professional contractors and serious DIY enthusiasts, these screws feature a durable silver finish and a hexagon head for high-torque tightening. While they offer exceptional structural integrity and corrosion resistance, their size and head profile mean they are best suited for large-scale timber projects rather than delicate finish work.
| Colour | Silver |
|---|---|
| Model Part Number | DIN 571 |
| Brand | Unifix |
Yes, for the M12 x 180 size, pre-drilling a pilot hole is highly recommended to prevent wood splitting and reduce installation torque.
Yes, the durable silver finish provides corrosion resistance suitable for outdoor timber structures, though they should be monitored if used in highly saline coastal environments.
You will need a socket wrench, a ratchet handle with the correct socket size, or an adjustable spanner.
It is an international technical standard that defines the dimensions and requirements for hexagon head wood screws, ensuring consistency and quality.
No, these are specifically designed for wood applications and lack the thread profile required for tapping into metal.
Ensure a pilot hole has been drilled; for M12 screws, a pilot hole is essential for most wood types.
The pilot hole is likely too small or non-existent; increase the diameter of the pilot drill bit.
Verify that your socket or spanner size matches the bolt head exactly to prevent rounding the edges.
To achieve the best results, always measure the thickness of the timber you are joining and choose an appropriate length to ensure sufficient thread engagement. Pre-drilling with a bit slightly smaller than the core diameter of the screw will significantly reduce installation effort and prevent damage to the wood. Keep the screws stored in a dry environment to maintain the integrity of the silver protective finish. While they are corrosion-resistant, adding a bit of lubricant to the threads before driving them into very dense wood can help prevent the screw from snapping during installation.
