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The Range£15.67Visit shop Unifix A2-304 Stainless Steel Coach Screws Hexagon Head Din 571 - M6 X 100 (Box Of 100) - White
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The Unifix Coach Screws (M10 x 100, Silver) are high-quality, corrosion-resistant fasteners designed for professional builders and DIY enthusiasts tackling heavy-duty wood construction projects. Crafted from A2-304 stainless steel, these screws offer exceptional durability in exterior environments, though they require pre-drilling to prevent timber splitting during installation.
| Colour | Silver |
|---|---|
| Model Part Number | 1427079 |
| Brand | Unifix |
Yes, their stainless steel construction makes them perfect for outdoor decking where rust resistance is required.
You will need a socket set or a dedicated hex-head driver bit that fits the M10 size.
It is highly recommended to pre-drill to ensure the screw enters straight and to prevent the timber from splitting.
A2-304 stainless steel offers good resistance, though in extreme salt-spray conditions, A4 (Marine Grade) might be preferred.
It is the German industrial standard that defines the dimensions and thread properties of hexagon head wood screws.
Ensure the pilot hole is the correct diameter; increase drill bit size by 1mm if resistance is too high.
Ensure the socket is seated fully on the hexagon head and check that the tool is not wobbling during rotation.
Stop immediately and verify that a proper pilot hole was drilled; consider using a countersink bit if the head is pulling the fibers.
For optimal results, ensure the length of the screw is sufficient to penetrate at least two-thirds of the depth of the base timber. Always clear wood shavings from the hole before driving the screw home. While A2-304 stainless steel is highly resistant to corrosion, avoid using these screws in highly acidic environments or in direct contact with certain chemicals that may cause surface tea-staining. To maintain, keep the threads free of debris during storage to prevent cross-threading during installation.
