Unifix General Purpose Chippy Woodscrews - 3.5 x 20mm - Gold

The Unifix General Purpose Chippy Woodscrews are designed for a variety of woodworking application...

Best current price£6.17from The Range

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The RangeUnifix General Purpose Chippy Woodscrews 5.0 X 40Mm - Ub9chippy/165 - Box Of 125 - Grey
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£6.17
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DebenhamsUnifix Unisex Gold Chippy Woodscrews 5.0 X 40Mm - Box Of 125 In
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£6.63
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eBayUnifix General Purpose Chippy Woodscrews 5.0 x 40mm - UB9CHIPPY/165 - Box of 125
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£6.64
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OnBuy.comUnifix General Purpose Chippy Woodscrews 5.0 X 40Mm - Ub9chippy/165 - Box Of 125 5014196543093
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£6.90
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B&QB&Q - General Purpose Chippy Woodscrews 5.0 X 40mmUb9Chippy/165Box Of 125
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£7.14
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Product Information

Full details

The Unifix General Purpose Chippy Woodscrews are essential fasteners for DIY enthusiasts and woodworkers seeking reliable holding power in general timber projects. Featuring a Pozi countersunk head, these screws offer enhanced drive and reduced cam-out during installation, making them ideal for both novice and professional applications. While they provide excellent corrosion resistance due to the ZYP coating, they are primarily designed for standard woodworking rather than high-load structural steel or heavy-duty masonry applications.

All features

ColourGold
Model Part NumberUb9Chippy/035
BrandUnifix

Extended Product Information

FAQs

Can I use these screws outdoors?

Yes, the ZYP coating provides effective corrosion resistance for most general outdoor DIY projects.

Do I need a special drill bit for these?

These screws require a standard Pozi-drive screwdriver bit for the best results and to prevent cam-out.

Are these screws suitable for metal?

No, these are specifically designed for woodworking applications and will not perform well in metal.

Can I reuse these screws?

It is generally not recommended, as the threads may be compromised and the Pozi recess may be worn after the initial removal.

What does the ZYP finish mean?

ZYP stands for Zinc Yellow Passivated, a protective coating process that provides both a gold aesthetic and improved rust resistance.

Troubleshooting

Screw head strips during installation

Ensure you are using a genuine Pozi-drive bit rather than a standard Phillips bit and check that the torque on your drill is not set too high.

Wood splits upon entry

Pre-drill a pilot hole slightly smaller than the diameter of the screw shank before driving the screw into the material.

Pros and Cons

Pros

  • Resistant to corrosion via ZYP coating
  • Easy to drive with standard Pozi screwdrivers
  • Flush finish thanks to the countersunk design
  • Large 250-piece pack size provides great value
  • Reduced likelihood of cam-out during use

Cons

  • Not intended for heavy-duty structural steel
  • Limited to specific material types like wood
  • Requires proper pilot holes for harder timber types

Setup, Compatibility & Care

  • Tool Compatibility: Use these screws with any standard manual Pozi screwdriver or a cordless drill set to a low-to-medium torque setting.
  • Installation: Always ensure your drill bit size matches the screw head type to prevent stripping the recess.
  • Maintenance: While the ZYP coating is corrosion-resistant, avoid using these in highly saline coastal environments or in direct contact with chemically treated woods that may accelerate oxidation.
  • Storage: Keep the remaining screws in a dry environment to maintain the integrity of the protective coating.

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