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B&Q£3.75Visit shop B&Q - Pozidriv Double-Countersunk A2 Stainless Steel Wood Screw (Dia)5mm (L)60mmPack Of 20
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This pack of 20 Diall Pozidriv Stainless Steel Screws is designed for DIY enthusiasts and builders needing durable fasteners for various wood projects. Their key benefit lies in the stainless steel construction, offering excellent corrosion resistance. A potential consideration is their specific Pozidriv head, requiring the correct driver bit. These screws are 60mm long with a 5mm diameter, featuring a double-countersunk design for a flush finish.
| Colour | Silver |
|---|---|
| Brand | Diall |
A Pozidriv screw head is similar to a Phillips head but has four additional small ribs between the main slots. This design provides better torque transfer and reduces the likelihood of the screwdriver 'camming out' (slipping out of the recess).
No, it is strongly recommended to use a Pozidriv screwdriver bit. While a Phillips bit might fit loosely, it can easily damage the screw head, making it difficult or impossible to drive fully.
Yes, they are made of stainless steel, which offers excellent resistance to rust and corrosion, making them ideal for outdoor applications like garden furniture or decking.
The double-countersunk head is designed to sit flush or slightly below the surface of the material being fastened. This creates a smooth, clean finish without any protruding metal, which is desirable for aesthetic reasons and to prevent snags.
To prevent wood splitting, especially near the edges or in hardwoods, always pre-drill a pilot hole. The pilot hole should be slightly smaller than the screw's core diameter and ideally about two-thirds the depth of the screw penetration.
With a 60mm length, these screws are suitable for joining two pieces of wood where the combined thickness is up to approximately 50-55mm, assuming adequate thread engagement in the second piece.
The primary difference is the quantity. This pack contains 20 screws. Larger packs offer more screws, which is more economical for substantial projects and reduces the need for repeat purchases.
Ensure you are using the correct size Pozidriv bit (PZ2). Apply firm, consistent downward pressure. If the head is already damaged, you may need to remove it with pliers or drill it out and start again with a new screw.
Check if a pilot hole was used, especially in denser wood. Ensure the material is stable and not flexing. Try starting the screw by hand to ensure it bites into the wood correctly before using a drill.
The hole may not be sufficiently countersunk. Ensure the pilot hole is properly formed or use a countersink bit to create a recess for the screw head. Ensure you are using the correct driver bit and applying enough pressure.
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