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B&Q£9.78Visit shop B&Q - M12 12mm Coach Screws Length: 140mm ( Pack Of: 1 ) Hex Hexagon Head Lag Bolts Wood Screws Steel Zinc Plated Din 571
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The DIYUK 12mm Hex Head Coach Screws are heavy-duty fasteners designed for professionals and DIY enthusiasts requiring reliable, high-strength structural connections in wood and concrete. These silver, zinc-plated lag bolts offer exceptional durability and simplified installation through their hexagon-head design, though users should note that pre-drilling pilot holes is essential to prevent material splitting during insertion.
| Colour | Silver |
|---|---|
| Model Part Number | M12 |
| Brand | DIYUK |
This product listing focuses on the screws themselves; please verify if washers are included in your specific kit or purchase them separately to ensure proper load distribution.
Yes, but you must use these in conjunction with appropriate masonry wall plugs or shields to create a secure anchor point.
A manual socket wrench, a ratchet with a 12mm-compatible socket, or an impact driver with a high-quality socket adapter is recommended.
While they are made of durable steel, it is generally recommended to use new fasteners for structural projects to ensure integrity.
These bolts typically feature a partial thread design standard for coach screws, providing a smooth shank for pulling the timber together tightly.
Ensure the pilot hole is the correct diameter; increase the drill bit size slightly if the resistance is extreme.
You are likely using a pilot hole that is too small or drilling too close to the edge of the wood.
Ensure you are using the correct size socket and that it is fully seated on the hex head before applying torque.
Installation is straightforward but requires proper preparation. Always mark your fixing points accurately and use a level to ensure the bolts enter straight.
For care, avoid using these in highly acidic or marine environments, as standard zinc plating may degrade over time. If the bolts are exposed to harsh weather, a periodic inspection of the head area for rust is recommended to ensure structural integrity remains intact.
