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OnBuy.com£6.25Visit shop A2-304 St/St Chippy Woodscrews 4.0 X 35Mm - General Purpose - Box Of 200 5014196170350
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The Range£6.30Visit shop Unifix A2-304 St/St General Purpose Chippy Woodscrews 4.0 X 25Mm - Q2021ch00040002500j - Box Of 200 - Grey
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The Unifix A2-304 Stainless Steel General Purpose Chippy Woodscrews are an essential fastener for both DIY enthusiasts and professional carpenters seeking long-term reliability in their woodworking projects. Crafted from premium A2-304 stainless steel, these screws offer exceptional corrosion resistance, making them ideal for high-moisture indoor and outdoor environments. While they provide excellent grip and a streamlined finish through their Pozi countersunk head, users should ensure they use the correct Pozi drive bit to prevent cam-out during installation.
| Colour | Grey |
|---|---|
| Model Part Number | Q2021CH00050005000J |
| Brand | Unifix |
Yes, the A2-304 stainless steel provides excellent corrosion resistance suitable for many outdoor applications, though A4 marine-grade might be required for direct salt-spray exposure.
While the screw point is sharp, pre-drilling is highly recommended when working with hardwoods or near the edge of boards to prevent splitting.
These screws require a Pozi drive bit. Check your drill set for a matching PZ2 or similar size bit.
Yes, A2-304 stainless steel is generally recommended for use with pressure-treated wood to avoid the corrosion common with standard plated screws.
Each box contains 200 screws.
Ensure the correct PZ bit size is being used and verify the driver is fully seated in the head.
Pre-drill a pilot hole slightly smaller than the shank diameter, especially near the ends of timber boards.
Check if the pilot hole is sufficient; do not use excessive torque if the wood is exceptionally dense.
For optimal results, ensure the use of a high-quality Pozi (PZ) driver bit matching the size of the screw head to prevent stripping. While the A2-304 material is highly resistant to elements, it remains susceptible to cross-threading if driven at an incorrect angle. Store the screws in a dry environment to maintain their clean finish before installation. When cleaning, avoid using harsh abrasive brushes that could damage the surface integrity, as these screws are designed to be maintenance-free once installed.
