Diall M8 Coach Bolt & Nut - Pack Of 5
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Product Information
Full details
This pack of five Diall M8 coach bolts and nuts is designed for DIY enthusiasts and tradespeople needing secure timber fastenings. Its key benefit is the durable carbon steel construction providing reliable strength for various projects. A potential caveat is that these are specifically recommended for timber applications, limiting their use on other materials.
All features
| Brand | Diall |
|---|
Extended Product Information
FAQs
What material are these coach bolts and nuts made of?
They are constructed from durable carbon steel with a zinc-plated finish for corrosion resistance.
What is the diameter and length of these bolts?
The bolts have an M8 diameter and a length of 130mm.
Are these suitable for metal applications?
These coach bolts and nuts are specifically recommended for use on timber. Their suitability for metal applications would depend on the specific load and environmental conditions, but they are not primarily designed for metal.
How many bolts and nuts are in a pack?
Each pack contains five coach bolts and five matching nuts.
What does 'partially threaded for 22mm' mean?
This indicates that the bolt has a threaded section extending up to 22mm from the end, with a smooth shank for the remainder of its length.
How do I prevent the bolt from turning when tightening the nut?
The square shape on the underside of the bolt head is designed to grip into the material (like timber) to prevent it from spinning when the nut is tightened.
Can I use these for structural load-bearing applications?
While durable for DIY projects, they are not intended for heavy-duty structural engineering applications where specific load ratings are critical. Always consult engineering specifications for critical structures.
Troubleshooting
Bolt head spins while tightening the nut.
Ensure the square section under the bolt head is properly seated into the material (especially timber) to prevent rotation. If the hole is too large or the material is too soft, it may not grip effectively.
Nut is difficult to thread onto the bolt.
Check for any debris or damage on the bolt threads or inside the nut. Ensure you are using an M8 nut with the M8 bolt. Do not force the threads, as this can cause cross-threading.
Corrosion or rust appearing.
While zinc plated, prolonged exposure to moisture can cause rust. Clean affected areas and consider applying a suitable protective coating if further exposure is expected.
Pros and Cons
Pros
- Constructed from durable carbon steel for reliability.
- Zinc plating provides good corrosion resistance.
- Standard M8 size offers wide compatibility.
- Generous 130mm length suitable for thicker materials.
- Ideal for timber-based DIY projects.
Cons
- Primarily recommended for timber, limiting use on other materials.
- Partially threaded design may not be suitable for all applications.
- May require specific tools for tightening.
- Not designed for heavy-duty structural engineering applications.
Setup, Compatibility & Care
Setup:
- Drill a hole slightly larger than the M8 diameter through the materials you wish to join.
- Insert the coach bolt through the aligned holes. The square section under the bolt head should seat into the timber to prevent rotation.
- Place the M8 nut onto the threaded end of the bolt.
- Tighten the nut using an appropriate spanner or wrench until secure. Ensure the bolt head does not spin while tightening the nut.
Compatibility:
- Primary Compatibility: Timber and wooden materials.
- Thread Size: M8 (Metric coarse thread).
- Nut Type: M8 hexagon nut (typically supplied with the bolt).
Care:
- Store in a dry environment to prevent corrosion, despite the zinc plating.
- If used outdoors, periodic inspection for signs of rust is recommended.
- Clean with a dry cloth if dusty.