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The Unifix Coach Screws Hexagon Head DIN 571 are designed for professionals and DIY enthusiasts requiring a heavy-duty, reliable fastening solution for timber projects. These M8 x 50mm screws provide exceptional holding power and structural integrity, though they require pilot holes to prevent wood splitting during installation.
| Colour | White |
|---|---|
| Model Part Number | 1426296 |
| Brand | Unifix |
They feature a bright zinc plating which provides moderate corrosion resistance. They are suitable for protected outdoor areas but not recommended for exposed marine or coastal environments.
Yes, for best results and to prevent timber splitting, especially in hardwoods, it is highly recommended to drill a pilot hole before insertion.
A socket wrench or a dedicated spanner that fits the M8 hexagon head is the most effective tool for installation.
This specific model measures M8 in diameter and 50mm in length.
No, these are specifically designed as coach screws for wood-to-wood or wood-to-material fastening applications.
Ensure the pilot hole is correctly sized for an M8 screw; try applying a small amount of lubricant like beeswax to the threads.
Verify that your socket or wrench fits the hex head perfectly and is not worn down; apply even, steady pressure.
Stop immediately and drill a slightly larger pilot hole; the pilot hole diameter should be approximately 70-80% of the core diameter of the screw.
To achieve the best results, always measure the thickness of the timber being joined to ensure sufficient thread engagement. It is essential to drill a pilot hole smaller than the shank diameter to prevent the timber from splitting upon insertion. Use a properly sized socket or spanner to drive the screw until the washer (if applicable) or head is flush with the timber surface. To maintain the integrity of the zinc finish, avoid using high-impact power tools that may strip the plating, and store the screws in a dry, low-humidity environment to prevent early oxidation.
