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B&Q£24.99Visit shop B&Q - Coach Screws Hexagon Head Din 571 BzpM10 X 100Pouhxc10 100 000Box Of 120
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The Unifix Coach Screws Hexagon Head DIN 571 are heavy-duty fasteners designed for professionals and DIY enthusiasts who require high-strength joints in wood and metal construction. They offer exceptional reliability and corrosion resistance for demanding assembly tasks, though users should ensure they choose the correct length and diameter for their specific material thickness to avoid wood splitting.
| Colour | White |
|---|---|
| Model Part Number | 1426655 |
| Brand | Unifix |
Yes, pre-drilling is highly recommended to prevent wood splitting and to ensure the screw drives in straight.
The finish is designed for enhanced corrosion resistance, making them suitable for most outdoor applications, though exposure to harsh coastal salt environments may require additional protection.
A standard socket wrench, spanner, or a drill with the appropriate socket adapter is required.
While they can be removed, it is generally recommended to use new screws for critical structural connections to ensure maximum holding power.
Select a screw long enough to penetrate the substrate securely, typically with at least two-thirds of the threaded length embedded in the base material.
Ensure the pilot hole is the correct diameter; for hardwood, the pilot should be nearly the diameter of the screw shank.
Verify that your socket or spanner is the correct size and seated fully onto the head before applying torque.
Reduce the size of the screw or increase the size of the pilot hole to decrease lateral pressure on the wood fibers.
For optimal results, pre-drilling a pilot hole is essential, especially in dense hardwoods, as this prevents the timber from splitting under the shank's diameter. Ensure your socket or wrench fits the hex head precisely to prevent rounding the edges. While the screws feature a high-quality finish, avoid using impact drivers on the highest settings if the finish is decorative, as extreme friction can heat the metal and potentially compromise the coating. Keep the fasteners in their original packaging to protect the finish from moisture when not in use.
