Unifix Woodscrews Slotted Round Head - 10G X 1.1/2" (5.0 X 40mm) - Black

The Unifix Woodscrews Slotted Round Head are designed for reliable wood joinery and general constr...

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The RangeUnifix Woodscrews Slotted Round Head Black Japanned 6G X 3/4" (3.5 X 20Mm) Ub9tqjrndsws/021 Box Of 1 - Grey
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eBayUnifix Woodscrews Slotted Round Head Black Japanned 6G X 3/4"" - Box of 125
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OnBuy.comUnifix Woodscrews Slotted Round Head Black Japanned 6G X 3/4" - Box Of 125 5014196543468
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B&QB&Q - Woodscrews Slotted Round Head Black Japanned6G X 3/4" (3.5 X 20mm)Ub9Tqjrndsws/021Box Of 125
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Product Information

Full details

The Unifix Woodscrews Slotted Round Head are an essential component for woodworkers and DIY enthusiasts looking for reliable, durable fasteners for general construction and joinery tasks. Featuring a 10G diameter and 1.1/2 inch length, these screws provide excellent holding power, though they require a manual or power-assisted slotted screwdriver for proper installation. The black japanned finish offers a classic aesthetic while providing necessary corrosion resistance for indoor and sheltered outdoor projects.

All features

ColourBlack
Model Part NumberUb9Tqjrndsws/091
BrandUnifix

Extended Product Information

FAQs

Are these screws suitable for outdoor use?

The black japanned finish provides some corrosion resistance, but they are primarily designed for indoor or sheltered use. For exposed outdoor applications, consider stainless steel options.

What does 10G mean?

10G refers to the gauge or diameter of the screw shank, which is approximately 5.0mm.

Do I need a special driver for these?

No, a standard flat-head (slotted) screwdriver that fits the width of the screw slot is all you need.

Can I use these with a power drill?

Yes, but use a low-torque setting to avoid over-driving the screw or stripping the slotted head.

What is the total length of these screws?

These screws are 1.1/2 inches long, which is equivalent to 40mm.

Troubleshooting

Screw head strips during installation

Ensure you are using the correct size flat-head screwdriver bit and apply firm, even downward pressure while turning.

Wood splits when the screw is driven

Always pre-drill a pilot hole with a diameter slightly smaller than the screw shank before driving it into the timber.

Screw is difficult to drive in

Apply a small amount of beeswax or soap to the threads to reduce friction in dense woods.

Pros and Cons

Pros

  • High-quality black japanned finish for corrosion resistance
  • Generous pack size of 125 units
  • Versatile 10G size suitable for most common woodworking tasks
  • Reliable and strong holding power in timber materials

Cons

  • Slotted head style is slower to drive than Phillips or Torx heads
  • Requires careful driver alignment to avoid slipping
  • Not intended for heavy-duty structural steel or masonry applications

Setup, Compatibility & Care

For optimal results, ensure you are using a flat-head screwdriver that fits snugly into the screw slot. While they can be installed with a power drill on a low-torque setting, manual installation is often preferred to maintain the finish of the screw head. Store the screws in a cool, dry place to maintain the integrity of the japanned finish. If used in humid environments, periodically check for signs of surface wear. When working with extremely hard timber, pre-drilling with a bit slightly smaller than the screw diameter will ease the installation process and prevent the screw from binding.

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