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OnBuy.com£10.08Visit shop M8 Hex Head Coach Screws Din 571 Bzp Zinc Plated Steel Lag Bolts Wood Screws 30Mm To 160Mm 5056826601230
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B&Q£14.88Visit shop B&Q - M8 8mm Coach Screws Length: 140mm ( Pack Of: 10 ) Hex Hexagon Head Lag Bolts Wood Screws Steel Zinc Plated Din 571
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The DIYUK 8mm Hex Head Coach Screws are designed for professional contractors and DIY enthusiasts who need a heavy-duty fastening solution for structural carpentry and outdoor construction projects. These screws provide exceptional clamping force and durability, making them ideal for heavy timber connections; however, they require pre-drilling into hardwood to prevent splitting and ensure a secure, long-lasting fit.
| Colour | Silver |
|---|---|
| Model Part Number | M8 |
| Brand | DIYUK |
Yes, the silver zinc plating provides protection against environmental factors and corrosion, making them suitable for outdoor construction.
It is highly recommended to pre-drill, especially when working with hardwood, to prevent the timber from splitting.
These screws feature a hex head, so a socket wrench, spanner, or an impact driver with the correct size socket is required.
No, these screws are specifically designed for timber applications. Using them in masonry requires appropriate wall plugs, though other specialty fixings are generally preferred.
These are 8mm in diameter and 140mm in length.
Ensure the socket or wrench is fully seated on the hex head and that you are using the correct metric size.
The pilot hole is likely too small or missing. Always pre-drill the timber before driving the screw.
Check that the pilot hole is deep enough and clear of debris; consider using a lubricant like beeswax on the threads.
For the best results, mark your pilot holes before driving the screws to ensure accurate alignment. Use a drill bit slightly smaller than the 8mm core of the screw to facilitate easy entry while maintaining maximum thread grip. When installing in exterior environments, occasional inspection of the screw head is recommended to ensure the zinc coating remains intact. If you notice any signs of white oxidation, a simple touch-up with a cold-galvanizing spray can help maintain longevity. Store the unused screws in a dry container to prevent early exposure to humidity.
