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B&Q£4.98Visit shop B&Q - Pozidriv Double Self-Countersunk Yellow-Passivated Steel Wood Screw (Dia)3.5mm (L)20mmPack Of 100
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This pack of 100 yellow zinc-plated, double-countersunk wood screws from TurboDrive is designed for DIY enthusiasts and professionals seeking reliable fasteners. The key benefit is their durable steel construction and yellow zinc plating for corrosion resistance, making them ideal for various wood applications. A minor caveat is that these are specifically for wood projects and not suited for metal or masonry.
| Colour | Yellow |
|---|---|
| Brand | TurboDrive |
These screws are suitable for a wide range of softwoods and hardwoods, common in most DIY projects. For very hard woods, pre-drilling a pilot hole is recommended.
The yellow zinc plating provides good corrosion resistance, making them suitable for moderately exposed outdoor applications. For harsh or continuously wet conditions, stainless steel or specialized outdoor screws might be more appropriate.
Double countersunk means the screw head is shaped to sink flush into the material without creating a raised edge, and this design often includes a secondary angle to help it seat perfectly in the countersunk hole.
This pack contains 100 screws.
The screws are 20mm in length and have a diameter of 3.5mm.
No, these screws are specifically designed for wood applications and should not be used for metal, plastic, or masonry.
The yellow zinc plating is a common finish for corrosion resistance. While it is visible, it often provides a functional rather than purely aesthetic finish. For projects where the screw head is painted over or in applications where aesthetics are paramount, alternative finishes might be considered.
Ensure you are using the correct screwdriver bit size and type. Apply firm, consistent downward pressure while driving. If the head is already stripped, consider using screw extractors.
Drill a pilot hole appropriate for the wood type and screw size. For hardwoods, ensure the pilot hole is adequately sized. Avoid overtightening.
Verify that a pilot hole was drilled, or if not, that the countersinking is adequate for the wood type. Ensure the drill bit used for the pilot hole is not too large, which can prevent the countersink from seating properly.
Check the screw head recess for any debris or damage. Ensure your screwdriver bit is clean and in good condition. Try a slightly different angle of insertion if possible.
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