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The Range£5.61Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated - M6 X 40 (Box Of 50) - White
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Unifix Coach Screws are ideal for professional contractors and dedicated DIY enthusiasts requiring secure fastening for heavy-duty timber and structural woodworking projects. These high-strength fasteners feature a robust hexagon head for high-torque applications and a Bright Zinc Plated finish for enhanced corrosion resistance. While they provide excellent holding power, users should note that they require pilot holes in hardwood to prevent timber splitting.
| Colour | Silver |
|---|---|
| Model Part Number | 1427094 |
| Brand | Unifix |
Yes, Unifix offers various sizes under the DIN 571 specification to accommodate different timber thicknesses.
The Bright Zinc Plated finish provides some corrosion resistance, but they are primarily recommended for interior or covered exterior use.
A standard socket wrench, ratchet set, or a power drill with a compatible socket driver bit is required.
While softwoods may not always require it, drilling a pilot hole is strongly recommended for hardwoods to prevent splitting and to ease installation.
DIN 571 is a German industrial standard that defines the dimensions and requirements for hexagon head wood screws.
Ensure a pilot hole has been drilled, especially in dense or aged timber.
Ensure the socket size is an exact match and the tool is seated fully on the head before applying torque.
Verify that the pilot hole is the correct diameter and that the screw is not placed too close to the edge of the wood.
To ensure optimal performance, always measure the thickness of the timber being joined to select the correct screw length. For hardwoods, it is essential to drill a pilot hole approximately 70-80% of the screw diameter to prevent the wood from splitting during insertion. Use a properly sized socket or wrench to avoid rounding off the hexagon head. Store the screws in a dry environment; although they are zinc plated, prolonged exposure to direct moisture may eventually compromise the finish.
