Best current price£5.61from The Range
Shopping.co.uk recommended and popular offers
The Range£5.61Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated - M6 X 40 (Box Of 50) - White
Visit shop23 offers from £5.61 - £14.99
View price history by clicking the chart icon.
The Unifix Coach Screws Hexagon Head DIN 571 are heavy-duty fasteners designed for both professional contractors and DIY enthusiasts who require a reliable, high-strength solution for securing timber or metal components. Featuring a durable bright zinc plated finish, these screws provide excellent resistance against corrosion, making them ideal for long-term structural integrity. While they offer superior holding power, users should note that they require pre-drilling in denser materials to prevent splitting or snapping during installation.
| Colour | Silver |
|---|---|
| Model Part Number | Ubhxc06 040 |
| Brand | Unifix |
Yes, the bright zinc plated finish offers good corrosion resistance for standard outdoor projects, though they should be avoided in marine or highly acidic environments.
A standard socket wrench or a spanner that matches the hexagon head size is required.
Yes, it is highly recommended to pre-drill a pilot hole to prevent the wood from splitting, particularly when working with hardwood.
These are primarily designed for wood or wood-to-metal applications; for purely metal-to-metal structural joints, please consult specialized mechanical fasteners.
DIN 571 is a technical standard specifying the requirements for hexagon head wood screws, ensuring uniformity in dimensions and thread geometry.
The pilot hole is likely too small or missing; ensure you drill a pilot hole suitable for the screw gauge.
Increase the diameter of the pilot hole or ensure you are not driving the screw too close to the end grain of the timber.
Check that the socket wrench is fully seated on the hexagon head and is the correct metric size.
For optimal results, ensure the pilot hole diameter is slightly smaller than the screw shank, especially when working with hardwoods. Using an impact driver or a ratchet handle will provide the most control during the driving process. While the bright zinc plating is rust-resistant, it is good practice to keep the fasteners in a dry, cool environment until use. If the screws are used in an exterior environment with high exposure to salt air or moisture, inspect them periodically for surface oxidation and apply a touch-up protective coating if necessary.
