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OnBuy.com£9.58Visit shop M12 Hex Head Coach Screws Din 571 Bzp Zinc Plated Steel Lag Bolts Sleeper Screws 80Mm To 300Mm 5056826600264
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B&Q£14.08Visit shop B&Q - M12 12mm Coach Screws Length: 180mm ( Pack Of: 5 ) Hex Hexagon Head Lag Bolts Wood Screws Steel Zinc Plated Din 571
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The DIYUK 12mm Hex Head Coach Screws are designed for professional contractors and dedicated DIY enthusiasts who require high-strength fastening solutions for structural construction, carpentry, and heavy-duty home improvements. Featuring a robust, zinc-plated steel construction, these lag bolts provide exceptional load-bearing capacity and corrosion resistance for both wood and concrete applications, though users should note that pre-drilling is essential to prevent material splitting during installation.
| Colour | Silver |
|---|---|
| Model Part Number | M12 |
| Brand | DIYUK |
Yes, pre-drilling is highly recommended to prevent the timber from splitting, particularly near edges or ends.
The zinc-plated finish offers good corrosion resistance for outdoor projects, though extreme coastal environments may require stainless steel alternatives.
These bolts typically utilize a standard metric hex socket sized to fit the 12mm head profile.
Yes, provided you use an appropriate masonry plug to ensure a secure anchor in the brickwork.
Yes, the robust steel construction can withstand the torque of an impact driver, provided the tool is used correctly.
Ensure the socket size exactly matches the hex head. If the tool is loose, it will cause the metal to deform under high torque.
The pilot hole is likely too small or non-existent. Always pre-drill the timber to relieve internal pressure.
The pilot hole may be too tight for the material density. Increase the pilot hole size slightly and ensure the screw path is clean.
For optimal results, ensure the pilot hole diameter is slightly smaller than the core of the screw to facilitate easy entry while maximizing thread bite. When working with concrete, use an appropriate masonry drill bit and a plastic wall anchor rated for 12mm hardware. Care should be taken to keep the screws in a dry environment prior to use; while they are zinc-plated, exposure to extreme moisture in storage can eventually degrade the finish. Always use a manual or impact-rated socket tool for installation to ensure the screw is driven straight and fully seated against the material surface.
