Unifix Twinthread Woodscrews Pozi Csk Head - 7G X 1.1/2 - Silver

Unifix Twinthread Woodscrews are designed for superior grip and strength in wood applications. The...

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eBayPLUSDRIV (POZI) COUNTERSUNK 12 x 1.75"" WOODSCREW HARDENED & ZINC PLATED PACK 100
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OnBuy.comUnifix Twinthread Woodscrews Pozi Csk Head Bzp - 7G X 1.1/2" - Box Of 200 5014196446899
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£4.81
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The RangeUnifix Twinthread Woodscrews Pozi Csk Head Bzp 9Tqtqcskpz/067 7G X 1.1/2" (3.9 X 40/30Mm) Box Of 200 - Grey
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£5.08
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B&QB&Q - Twinthread Woodscrews Pozi Csk Head Bzp9Tqtqcskpz/0677G X 1.1/2" (3.9 X 40/30mm)Box Of 200
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£5.55
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City Plumbing GBUnifix Twinthread Hdnd Pozi Csk Bzp 10Gx2in Screw Ce 200 9Tqtqcskpz/136
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£5.78
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Product Information

Full details

The Unifix Twinthread Woodscrews are ideal for both professional contractors and DIY enthusiasts who require reliable, high-strength fastening for timber projects. Featuring a specialized twinthread design for superior grip and a Pozi countersunk head, these screws offer exceptional hold and a clean, flush finish. While they provide excellent corrosion resistance, it is important to ensure you select the correct gauge and length for your specific material density to avoid splitting.

All features

ColourSilver
Model Part Number1261301
BrandUnifix

Extended Product Information

FAQs

Can these screws be used outdoors?

Yes, they feature a corrosion-resistant finish, making them suitable for most exterior timber projects.

Do I need to drill a pilot hole?

While not always necessary for softwoods, drilling a pilot hole is highly recommended for hardwoods to prevent splitting.

What driver bit do I need?

These screws require a Pozi-drive bit that corresponds to the screw gauge.

How many screws come in a box?

Each box contains 200 high-quality screws.

Can I use these in plastic or metal?

No, these are specifically designed for wood applications and may not hold correctly in other materials.

What is the benefit of the twinthread design?

The twinthread design provides superior grip in wood, significantly reducing the chance of the screw backing out over time.

Troubleshooting

Screw head strips during installation

Ensure you are using the correct Pozi bit size and that the bit is not worn down.

Wood splits when the screw enters

Drill a pilot hole slightly smaller than the shank diameter of the screw.

Screw does not sit flush

Use a countersink bit to create a small bevel for the screw head to seat into.

Pros and Cons

Pros

  • Reduced cam-out due to the Pozi drive system
  • Superior pull-out resistance from the twinthread design
  • Professional, flush finish with countersunk heads
  • High corrosion resistance for long-term durability
  • Convenient 200-count packaging

Cons

  • Requires proper pilot holes in very dense hardwoods to prevent splitting
  • Limited to wood-based applications
  • Specific thread length requires careful selection based on material thickness

Setup, Compatibility & Care

To ensure optimal performance, always select a screwdriver bit that matches the Pozi size exactly. Using a worn bit can damage the screw head and cause slippage.

  1. Pilot Drilling: Always drill a pilot hole in hardwoods or near the edge of a board to avoid splitting the timber.
  2. Drill Settings: If using an electric drill, set the clutch to a low torque setting initially to prevent over-driving the screw.
  3. Compatibility: These screws are designed for wood materials. Do not use in masonry or metal substrates as this will strip the threads.
  4. Storage: Keep the screws in their original box in a dry, low-humidity environment to maintain the integrity of the corrosion-resistant coating.

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