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The Range£8.34Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated - M6 X 75 (Box Of 50) - White
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Unifix Coach Screws are heavy-duty fasteners designed for professional wood-to-wood structural applications, offering high-strength holding power for timber framing and construction projects. These hexagon-head screws provide a secure grip and feature a bright zinc-plated finish for added corrosion resistance, making them suitable for long-term installation. While highly durable, these fasteners require pre-drilling in hardwoods to prevent the timber from splitting during insertion.
| Colour | White |
|---|---|
| Model Part Number | 1427242 |
| Brand | Unifix |
Yes, the bright zinc plating offers moderate corrosion resistance, making them suitable for sheltered outdoor areas, but they are not recommended for coastal or harsh, wet environments.
A standard socket wrench, spanner, or a drill/impact driver with a hexagonal socket bit is required.
While softwoods might allow for driving without a pilot hole, pre-drilling is highly recommended to prevent wood from splitting and to ensure a professional finish.
DIN 571 is a German industrial standard that defines the dimensions and requirements for hexagon head wood screws, ensuring uniformity in size and performance.
They are designed primarily for wood-to-wood structural framing. If attaching metal brackets, ensure the hole in the bracket is wide enough to accommodate the screw shank.
Ensure a pilot hole has been drilled; the pilot hole should be slightly smaller than the screw shank.
Stop immediately and increase the pilot hole diameter; ensure the screw is placed away from the edge of the board.
Check that the socket size perfectly matches the hexagon head and ensure the driver tool is fully seated on the head.
For optimal results, always measure the thickness of the wood being joined. It is highly recommended to pilot drill the timber with a drill bit slightly smaller than the core diameter of the screw to ensure easy entry and prevent wood splitting. Once installed, the bright zinc-plated surface generally requires no additional care. However, in exterior applications, regularly inspect the fastener heads for signs of environmental exposure. If the coating is scratched during installation, applying a touch of galvanized spray can help maintain protection against rust.
