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Coach Screw - Forgefix - M12 x 70mm - Zinc Plated

Coach Screw - Forgefix - M12 x 70mm - Zinc Plated

Forge 5CS1270 Coach Screw Hexagon Head Single Thread ZP M12 x 70mm Bag of 5. These Forgefix single...

Best current price£0.53from Power Tools Direct

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Product Information

Full details

This guide is for DIY enthusiasts, builders, and tradespeople needing robust fixings. The Forgefix Coach Screw offers a strong, durable, and corrosion-resistant solution for timber applications, especially in fencing and joinery. A potential caveat is that its size and thread type may not be suitable for all materials or applications without proper pilot holes or wall plugs.

All features

ColourSilver
Model Part Number5CS1270
BrandForgefix

Extended Product Information

FAQs

What is the main purpose of a coach screw?

Coach screws are heavy-duty fasteners primarily used for securely fixing timber to timber, or for attaching hardware to timber structures, providing a strong mechanical connection.

What size spanner do I need for an M12 coach screw?

Typically, an M12 hexagon head requires a 19mm A/F (Across Flats) spanner or socket.

Do I need to drill a pilot hole?

Yes, pre-drilling a pilot hole is highly recommended to prevent splitting the timber and to ensure the screw drives in straight and with maximum holding power. The pilot hole should be slightly smaller than the screw's core diameter.

Can I use these screws in masonry?

Yes, coach screws can be used in masonry (brick, concrete) when used in conjunction with appropriate nylon wall plugs. Drill a hole for the plug, insert the plug, and then drive the screw into the plug.

What does 'single thread' mean?

Single thread indicates that the screw has one continuous helical ridge running around its shaft. This design is efficient for fastening into wood.

How does zinc plating help?

Zinc plating provides a protective layer that significantly increases the screw's resistance to rust and corrosion, extending its lifespan, especially in outdoor or damp conditions.

What does DIN571 standard signify?

Conforming to DIN571 means the coach screw meets a specific German industry standard for dimensions, material, and performance, ensuring a level of quality and reliability.

Troubleshooting

Screw is difficult to drive in.

Ensure a pilot hole has been drilled and is the correct size. If the wood is very hard, you may need a slightly larger pilot hole or more torque. Check for obstructions in the hole.

Screw head strips during tightening.

Use the correct size socket or spanner. Ensure it is seated fully on the hexagon head before applying torque. If already stripped, specialized extraction tools may be needed.

Screw does not feel secure.

Verify the pilot hole size. If using with a wall plug, ensure the plug is the correct type and size for the material and drill hole. Re-assess the material's strength; this screw is for substantial fixings.

Corrosion observed on the screw.

While zinc plating offers protection, extreme conditions can lead to corrosion. Clean the affected area. For critical applications, consider stainless steel alternatives if corrosion is a persistent issue.

Pros and Cons

Pros

  • Excellent corrosion resistance due to zinc plating.
  • Strong and reliable fastening for demanding applications.
  • Easy to install with standard tools due to hexagon head.
  • Durable construction meets industry standards (DIN571).
  • Versatile for various timber-based projects.

Cons

  • Requires pre-drilling pilot holes for optimal performance.
  • May require specific tools (spanner/socket) for tightening.
  • Not suitable for direct use in brittle materials like plasterboard without anchors.
  • Single thread may be less suitable for very soft woods compared to twin thread screws.
  • Pack quantity of 5 may be insufficient for large projects.

Setup, Compatibility & Care

Setup:

  1. Select Appropriate Location: Determine the exact placement for your fixing.
  2. Pre-Drill Pilot Hole: Use a drill bit slightly smaller than the screw's core diameter (typically around 10mm for M12) to create a pilot hole in the timber.
  3. Insert Screw: Place the coach screw into the pilot hole.
  4. Tighten: Use a suitable spanner or socket wrench (e.g., 19mm A/F) to turn the hexagon head clockwise until the screw is firmly seated. Avoid over-tightening, which could strip the threads or damage the material.
  5. Masonry Fixings: If fixing into brick or concrete, drill a hole appropriate for a nylon wall plug, insert the plug, and then drive the coach screw into the plug.

Compatibility:

  • Primarily designed for use with hardwoods and softwoods.
  • Compatible with standard nylon wall plugs for use in masonry.
  • Requires spanner or socket wrench for installation (typically 19mm A/F).

Care:

  • The zinc plating offers good corrosion resistance. However, prolonged exposure to harsh chemicals or extremely corrosive environments may still cause degradation.
  • Clean with a dry or slightly damp cloth if dirt accumulates. Avoid abrasive cleaners.
  • Inspect periodically for signs of wear or corrosion, especially in outdoor applications.

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