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Concrete Screws - 7.5mm X 150mm

Concrete Screws - 7.5mm X 150mm

Engineered for secure masonry fixings, these concrete screws provide strong holding power without ...

Best current price£10.75from Professional Building Supplies

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Professional Building Supplies7.5mm x 60mm - Concrete Screws - Bag of 20
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B&QB&Q - 7.5mm X 60mmConcrete ScrewsPack Of 100
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Product Information

Full details

The Bolts.co.uk Concrete Screws (7.5mm X 150mm) are designed for professionals and DIYers needing a robust fixing solution for masonry. They offer strong holding power directly into concrete, eliminating the need for additional anchors or inserts, making them ideal for attaching timber battens, metal channels, and general mounting hardware. A potential consideration is that their specific size and thread type are optimized for concrete, meaning they may not be suitable for all material types or lighter-duty applications.

All features

Model Part NumberRBCS75150
BrandBolts.co.uk

Extended Product Information

FAQs

What is the purpose of the special thread on these screws?

The aggressive, hardened thread is designed to cut into concrete and masonry, creating a strong mechanical interlock for superior holding power without the need for a separate anchor.

Can I use these screws in brick?

Yes, these screws are suitable for use in solid brick. For hollow brick or blockwork, ensure you use the correct pilot hole size and consult manufacturer guidelines for load-bearing capacity.

What size drill bit do I need for the 7.5mm x 150mm screw?

Typically, a 6mm masonry drill bit is recommended for a 7.5mm diameter concrete screw. Always verify the specific recommendation on the product packaging or manufacturer's technical data sheet.

How deep should I drill the pilot hole?

The pilot hole depth should generally be slightly deeper than the screw's embedment depth to allow for clearance. For a 150mm screw, aim for a hole depth of approximately 160-170mm, but always check the specific installation instructions.

Can I reuse these concrete screws?

While it might be possible to unscrew them, the threads can be damaged during removal, compromising their holding power. It is generally recommended to use new screws for reassembly or new fixing points.

Are these screws suitable for exterior use?

Many concrete screws feature corrosion-resistant coatings suitable for exterior use. However, for highly corrosive environments, stainless steel variants may offer superior longevity.

What other sizes are available?

Bolts.co.uk offers these concrete screws in various lengths, including 60mm, 80mm, 100mm, and 120mm, all with a 7.5mm diameter, to accommodate different project needs.

Troubleshooting

Screw is difficult to drive.

Ensure the pilot hole is drilled to the correct diameter and depth. Clean any debris from the hole. Check that the substrate is suitable for this type of fixing.

Screw spins freely or does not tighten.

The pilot hole may be too large or the substrate is too soft/crumbly. Drill a new hole in a slightly different location and ensure the correct pilot hole size is used. For crumbly materials, consider alternative fixings.

Screw head is damaged during installation.

Ensure the correct driver bit is used and fully seated in the screw head. Do not apply excessive sideways pressure. Use a drill/driver with adjustable torque settings if available.

Corrosion or rust on the screws.

These screws are generally corrosion-resistant, but prolonged exposure to harsh elements can cause surface rust. Ensure they are stored in a dry place. For critical applications, consider stainless steel variants if available.

Pros and Cons

Pros

  • Eliminates the need for separate wall plugs or anchors.
  • Offers superior pull-out strength in concrete compared to traditional screws.
  • Fast and straightforward installation process into pre-drilled holes.
  • Durable construction for long-lasting performance.
  • Suitable for various heavy-duty applications in construction and renovation.

Cons

  • Requires a specific pre-drilled hole size and type.
  • Not suitable for all substrates (e.g., drywall, solid wood without anchors).
  • Can be more expensive per unit than standard screws and plugs.
  • Removal can be more difficult than standard fixings once fully seated.

Setup, Compatibility & Care

Setup:

  1. Determine Material: Ensure the substrate is suitable (concrete, brick, dense blockwork).
  2. Select Drill Bit: Use a masonry drill bit that matches the screw's recommended pilot hole diameter (refer to packaging or manufacturer specs).
  3. Drill Pilot Hole: Drill to the required depth, ensuring the hole is clean and straight.
  4. Insert Screw: Drive the concrete screw into the pilot hole using a drill/driver with the appropriate bit (usually Torx/star drive) until it is flush with the surface or the desired depth.

Compatibility:

  • Suitable Substrates: Concrete, solid brick, cinder block, stone.
  • Not Recommended For: Drywall, hollow block (without proper backing), timber (without pre-drilling and load considerations), plaster.
  • Tools: Requires a power drill/driver and an appropriate masonry drill bit and driver bit (e.g., Torx T25 for 7.5mm screws).

Care:

  • Store screws in a dry environment to prevent premature corrosion.
  • Clean any debris from the pilot hole before insertion for optimal grip.
  • Avoid over-tightening, which can strip the threads in the substrate or damage the screw head.

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