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B&Q£6.63Visit shop B&Q - 3.5mm X 30mm Countersunk Wood Chipboard Screw Fasteners Pz2 Drive 20Pc
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This guide is for DIY enthusiasts and professionals requiring reliable fasteners. The key benefit is enhanced strength and corrosion resistance for woodworking projects. A caveat is that these are specifically designed for wood and chipboard, not for heavy-duty structural applications. These AB Tools countersunk wood screws feature a double countersunk head to minimize head shear and aid flush finishes. Manufactured from durable, brass-plated steel, they offer excellent rust and corrosion resistance. The pack contains 20 screws, each measuring 3.5mm in diameter and 30mm in length, with a PZ2 drive type.
| Model Part Number | FAF050 |
|---|---|
| Brand | AB Tools |
A Pozi drive has four additional small slots at a 45-degree angle compared to a Phillips head, providing better grip and reducing the chance of the driver 'camming out' (slipping out of the head).
The brass plating offers good corrosion resistance, making them suitable for some outdoor applications if not constantly exposed to harsh weather. For prolonged exterior use, specialized exterior-grade screws are recommended.
For 3.5mm screws, a pilot hole around 2mm to 2.5mm is typically recommended for softwoods, and slightly larger (2.5mm to 3mm) for hardwoods to prevent splitting.
Yes, they are specifically designed for wood and chipboard due to their deep thread and countersunk head.
Always pre-drill a pilot hole that is slightly narrower than the screw's thread diameter, especially near the edges of the wood. For very hard woods, a slightly larger pilot hole might be necessary.
It means the underside of the screw head is also angled, allowing it to sit perfectly flush or slightly below the surface of the material without damaging it, and preventing the head from lifting or 'proud'.
The total length is 30mm, which includes the height of the countersunk head.
Ensure you are using a correct size PZ2 bit and that it is firmly seated in the screw head. Do not over-tighten. If the head is already damaged, try a screw extractor or carefully remove the screw.
The material may be too soft, or the pilot hole may be too large. Try a slightly larger screw or a screw with a finer thread if available for the application. Ensure the screw is long enough to penetrate sufficiently into the supporting material.
The pilot hole may be too shallow, or the material is very hard. Use a countersink bit to create a suitable recess for the screw head. Ensure the wood is not splintered around the hole.
While brass plated, prolonged exposure to moisture can still cause surface corrosion. Ensure the environment is dry or apply a protective sealant. Clean gently with a soft cloth if minor surface marks appear.
Setup: To use these screws, ensure you have a PZ2 (Pozi drive) screwdriver or drill bit. Pre-drilling a pilot hole, especially in harder woods, can prevent splitting and make driving easier. The pilot hole should be slightly smaller than the screw's thread diameter.
Compatibility: These screws are designed for use with wood, chipboard, and similar composite wood materials. They are not suitable for metal, plastic, or masonry. Ensure your screwdriver bit is a genuine PZ2 to achieve optimal grip and avoid stripping the screw head.
Care: While the brass plating offers good corrosion resistance, prolonged exposure to harsh, wet environments without protection may eventually lead to degradation. Store screws in a dry place. If used outdoors, consider using a more specialized exterior-grade screw or applying a sealant to the fastened area.
