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OnBuy.com£8.49Visit shop A2-304 St/St Woodscrews Pozi Csk Head 4.0 X 50Mm - Q207997000400050000 - Box Of 200 5014196025919
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The Range£8.55Visit shop Unifix A2-304 St/St Woodscrews Pozi Csk Head 4.0 X 40Mm - Q207997000400040000 - Box Of 200 - Grey
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The Unifix A2-304 Stainless Steel Woodscrews are designed for professional woodworkers and DIY enthusiasts who require reliable, long-lasting fasteners for interior and exterior projects. These screws offer exceptional corrosion resistance and a secure fit through their precision Pozi countersunk head design, making them ideal for high-quality carpentry; however, they require pre-drilling in hardwoods to prevent wood splitting during installation.
| Colour | Grey |
|---|---|
| Model Part Number | Q207997000500040000 |
| Brand | Unifix |
Yes, the A2-304 stainless steel is highly resistant to corrosion, making them suitable for most outdoor wood applications.
While they feature a sharp point, we highly recommend drilling pilot holes to ensure the best hold and to prevent wood splitting.
A2-304 is a grade of stainless steel that offers excellent corrosion resistance and strength, commonly referred to as 18/8 stainless.
A2-304 provides good protection, but in severe salt-air or marine environments, A4-316 grade stainless steel is generally recommended.
The Pozi head allows for higher torque transmission than a standard Phillips head and is less likely to slip or cam-out during driving.
Ensure you are using the correct size Pozi bit and that it is fully seated in the recess before applying pressure.
Drill a larger pilot hole first, especially when working with hardwoods or dense materials.
Check if the screw was contaminated by carbon steel filings from other tools; clean the surface with a stainless steel-safe abrasive cleaner.
To ensure the best results, use a compatible Pozi screwdriver bit that matches the recess size perfectly to prevent 'cam-out' or damage to the screw head. When working with treated timber, ensure your driver settings are adjusted to prevent over-driving, which can strip the wood fibers around the head.
Storage of these stainless steel screws should be in a dry, temperate environment to maintain their finish. Keep them in their original box to prevent them from becoming contaminated with carbon steel dust, which can cause surface 'flash rusting' on the stainless steel if they are stored in contact with standard steel workshop tools.
