Best current price£5.04from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£5.04Visit shop Unifix Twinthread Woodscrews Pozi Round Head Bzp - 8G X 1" (4.0 X 25Mm) - Box Of 200 5014196421483
Visit shop
The Range£5.21Visit shop Unifix Twinthread Woodscrews Pozi Round Head Bzp 6G X 1" (3.5 X 25Mm) 9Tqtqrndpz/041 Box Of 200 - Grey
Visit shop10 offers from £5.04 - £6.28
View price history by clicking the chart icon.
The Unifix Twinthread Woodscrews (8G x 1" / 4.0 x 25mm) are essential fasteners designed for woodworkers and DIY enthusiasts looking for reliable, high-grip joinery. These screws feature a durable Bright Zinc Plated (BZP) finish and a versatile Pozi drive system, making them ideal for secure timber projects, though they are specifically optimized for wood applications rather than masonry or metal.
| Colour | Grey |
|---|---|
| Model Part Number | 9Tqtqrndpz/081 |
| Brand | Unifix |
These screws feature a BZP finish which is intended for indoor, dry environments. They are not recommended for permanent outdoor exposure.
While the twinthread design helps grip quickly, a pilot hole is highly recommended when working with hardwoods to prevent splitting.
Pozi drives have extra 'fins' that provide better torque and grip, preventing the screwdriver from slipping out during installation.
These are specialized wood screws. They are not engineered to self-tap into metal and should be reserved for wood-to-wood joinery.
This product is supplied in a bulk box containing 200 individual screws.
8G refers to the gauge (thickness) of the screw shank, which is approximately 4.0mm.
Ensure you are using a genuine Pozi bit and not a standard Phillips bit, which often leads to cam-out.
Always drill a pilot hole first when driving screws into narrow timber ends or near the edge of a board.
The pilot hole may be too large; try a smaller drill bit or drive the screw into fresh wood grain.
For optimal results, ensure the use of a high-quality Pozi (PZ) bit that matches the screw size to avoid damaging the recess. While the twinthread design is efficient, always check the density of the wood; using a small pilot hole (roughly 70% of the screw shank diameter) will prevent splitting in harder timbers. Store these screws in a dry area to maintain the integrity of the zinc plating. If installing near salt air or high-humidity zones, consider a stainless steel alternative, as the BZP finish is primarily intended for general indoor use.
