Forgefix Coach Bolt & Nut - Silver - M12 x 150mm

Versatile fixings for low load bearing applications. Square neck prevents twisting when used in ti...

Best current price£2.08from Power Tools Direct

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Rapid Online - Rapid Electronics Ltd.ForgeFix 10CB1065 Carriage Bolt & Nut ZP M10 x 65mm Bag 10
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AmazonForgeFix Carriage Bolts | M10 x 65mm | Zinc Plated | Bag 10
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Product Information

Full details

This guide is for DIY enthusiasts and trade professionals seeking reliable fixings for light-duty timber construction. The Forgefix M12 x 150 Coach Bolts offer a versatile and weather-resistant solution for joining timber components. While ideal for applications like garden furniture and fence panels, it's crucial to remember they are designed for **low load-bearing** uses.

All features

ColourSilver
Model Part Number5CB12150
BrandForgefix

Extended Product Information

FAQs

What does 'M12 x 150' mean?

'M12' refers to the nominal diameter of the bolt's thread in millimeters (M stands for Metric, 12mm diameter). '150' refers to the length of the bolt, also in millimeters, from underneath the head to the end of the thread.

Are these coach bolts suitable for outdoor use?

Yes, these Forgefix Coach Bolts are zinc-plated, which provides good resistance to rust and corrosion, making them suitable for general outdoor use in applications like garden furniture and fence panels.

Can I use these to join metal to timber?

While technically possible with appropriate washers and drilling, coach bolts are primarily designed for timber-to-timber connections where the square neck can bite into the wood. For metal-to-timber, consider using hex bolts with washers on both sides for a more secure and versatile connection.

How many bolts come in this pack?

This specific product is sold as a '5 Pack', meaning you will receive five M12 x 150 coach bolts, each complete with its corresponding hex nut.

What tools do I need to install these coach bolts?

You will need a drill, a drill bit (slightly larger than 12mm but smaller than the square neck, e.g., 12.5mm or 13mm), and a wrench (typically a 19mm spanner or socket for M12 nuts) to tighten the nuts.

What is the maximum load these bolts can hold?

These bolts are specified for low load-bearing applications. They are not designed for heavy structural loads where specific shear and tensile strength calculations are critical. Always consult a structural engineer for high-load applications.

Troubleshooting

Bolt spins freely when tightening the nut.

This usually means the square neck of the bolt is not fully engaged or has stripped the timber. Remove the bolt, ensure the pilot hole is correctly sized (not too large), and reinsert, potentially tapping gently to seat the square neck securely. If the timber is too soft or damaged, you might need to relocate the fixing or reinforce the timber.

Bolt is too long/short for the application.

Carefully measure the combined thickness of the timber pieces you are joining, plus the thickness of any washers, to ensure you select the correct bolt length. This M12 x 150mm bolt is designed for a specific range of thicknesses; if it's incorrect, you'll need a different size.

Signs of rust or corrosion appearing prematurely.

While zinc-plated, continuous exposure to harsh elements, or damage to the zinc coating, can lead to rust. Ensure the zinc plating wasn't scratched during installation. For extreme outdoor conditions, consider alternative fasteners with hot-dip galvanized or stainless steel finishes. Applying a protective paint over the bolt head and nut can also help.

Pros and Cons

Pros

  • Easy Installation in Timber: The square neck design simplifies installation, preventing rotation.
  • Weather Resistant: Zinc plating offers good protection against rust for outdoor use.
  • Secure Fastening: Provides a strong, reliable joint for appropriate timber applications.
  • Versatile for DIY Projects: Ideal for a wide range of common outdoor timber constructions.

Cons

  • Low Load Applications Only: Not suitable for high-stress or structural load-bearing connections.
  • Timber Specific: Primarily designed for use with timber; not ideal for metal-to-metal or other material fixings.
  • Specific Size: M12 x 150mm might be too large or too small for certain specific projects, requiring careful measurement.
  • Hand Tools Needed: Requires pre-drilling and wrenches for proper installation.

Setup, Compatibility & Care

Setup Instructions

  1. Measure and Mark: Precisely measure and mark the locations for your bolts on both timber pieces to be joined.
  2. Drill Pilot Hole: Using a drill bit slightly larger than the threaded shaft of the M12 bolt but smaller than the square neck (e.g., a 12.5mm or 13mm drill bit for the M12 bolt), drill a straight pilot hole through both pieces of timber. Ensure the hole is perpendicular to the surface.
  3. Insert Bolt: Push the coach bolt through the drilled hole. If the square neck does not fully engage with the timber, you may need to gently tap the bolt head with a hammer (using a block of wood as a buffer to protect the bolt head) until the square neck is seated firmly and resists turning.
  4. Attach Nut: Place the hex nut onto the threaded end of the bolt. For added stability, consider using a washer between the nut and the timber surface.
  5. Tighten: Use an appropriate wrench (typically 19mm for M12 nuts) to tighten the hex nut until the connection is secure. Do not overtighten, as this can damage the timber.

Compatibility

  • Materials: Primarily designed for joining timber to timber. Can also be used for timber joist construction.
  • Environments: Zinc-plated finish makes them suitable for general outdoor and indoor use. Avoid highly corrosive or marine environments.
  • Load Type: Low load-bearing applications only.

Care and Maintenance

  • Inspection: Periodically inspect outdoor installations for any signs of loosening or corrosion, especially after harsh weather.
  • Cleaning: Wipe away dirt or debris to prevent buildup that could trap moisture.
  • Protection: While zinc-plated, applying a suitable exterior wood sealant or paint over the bolt heads and nuts in highly exposed areas can further extend their lifespan and maintain appearance.

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