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The Range£9.00Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated - M6 X 65 (Box Of 50) - White
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The Unifix Coach Screws (M6 x 65) are professional-grade fasteners designed for contractors and DIY enthusiasts who require a heavy-duty, secure hold in wood-based construction and furniture assembly. These screws offer the key benefit of high-torque installation via their hexagon head design, ensuring a reliable connection for structural and decorative projects alike. A primary caveat is that these are specific to heavy-duty fastening and require pre-drilling in hardwoods to prevent splitting, as the screw diameter is substantial.
| Colour | Silver |
|---|---|
| Model Part Number | DIN 571 |
| Brand | Unifix |
Yes, it is highly recommended to use a pilot hole, especially when working with hardwood to prevent the timber from splitting.
The bright zinc plating offers decent corrosion resistance, but they are best suited for indoor or protected outdoor areas.
These require a wrench or a socket set as they feature a hexagon head rather than a cross-head or slotted drive.
The product listed is the M6 x 65mm variant, which has a 6mm shank diameter.
DIN 571 is a technical standard for hexagon head wood screws, ensuring uniform dimensions and thread patterns for professional applications.
Yes, you can use a power drill or impact driver provided you use a socket adapter bit that fits the hexagon head.
Ensure a proper pilot hole has been drilled, particularly if working with dense or seasoned hardwoods.
Verify you are using the correct metric socket size and that the tool is fully seated on the head before applying torque.
Stop immediately, remove the screw, and increase the size of your pilot hole to reduce internal pressure on the wood fibers.
To ensure optimal performance, always measure the thickness of the materials being joined to confirm the 65mm length will not protrude awkwardly. For softwood, you may drive the screw directly; however, for hardwoods, it is highly recommended to drill a pilot hole at roughly 70-80% of the screw shank diameter. Keep the screws stored in a dry environment to maintain the integrity of the zinc coating. If the screws are used outdoors, periodically inspect them for signs of surface oxidation and touch up with exterior-grade paint if the zinc plating is scratched during installation.
