Forgefix Carriage Bolt & Nut - M8 x 160mm - Bag 10 - Multicolor
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Product Information
Full details
The Forgefix M8 x 160mm Zinc Plated Carriage Bolts and Nuts are designed for individuals and professionals seeking a robust solution for securely fastening timber to timber. Their key benefit lies in providing strong, corrosion-resistant joints, ensuring long-lasting stability for your projects. While highly effective for timber, it's important to note their specific design limits their optimal use to this application. Each bag contains 10 bolts, fully threaded to 100mm, complete with hex nuts, making them an essential component for construction and DIY tasks involving wood.
All features
| Colour | Multicolor |
|---|---|
| Brand | Forgefix |
Extended Product Information
FAQs
What does 'ZP' stand for?
ZP stands for Zinc Plated. This coating provides excellent corrosion resistance, making the bolts suitable for various applications, including outdoor use.
Can I use these bolts for metal applications?
No, these carriage bolts are specifically designed for 'timber-to-timber' fastening. The square neck is intended to grip wood, preventing the bolt from spinning. They are not recommended for metal.
What tools do I need to install these bolts?
You will need a drill with a wood drill bit (typically 8-9mm for M8 bolts), a hammer or mallet to seat the bolt, and a spanner or wrench (13mm for M8 nuts) to tighten the hex nut.
How long is the threaded portion of the bolt?
Each M8 x 160mm bolt is fully threaded for the first 100mm of its length. The remaining 60mm under the head is smooth.
How many bolts and nuts come in a bag?
Each bag contains 10 M8 x 160mm carriage bolts, with a corresponding hex nut supplied for each bolt.
Do I need to drill a pilot hole?
Yes, drilling a pilot hole slightly larger than the bolt's shaft diameter is crucial. This prevents timber splitting and allows the square neck to properly seat, preventing the bolt from spinning during tightening.
Are these suitable for outdoor use?
Yes, due to their zinc-plated finish, these bolts offer good corrosion resistance and are suitable for outdoor timber applications like decking, pergolas, and garden furniture.
Troubleshooting
Bolt spins when trying to tighten the nut
The square neck of the carriage bolt has not properly seated into the timber. Remove the bolt, ensure the pilot hole is correctly sized, and gently tap the bolt head with a hammer or mallet until the square neck bites firmly into the wood.
Nut won't thread onto the bolt or feels loose
Check for cross-threading by removing the nut and re-aligning it. Inspect both the bolt threads and the nut threads for damage. If either is damaged, replace the affected component.
Difficulty pushing the bolt through the timber
Ensure the pilot hole is sufficiently sized. It should be slightly larger than the bolt's shaft diameter. Check for any obstructions within the drilled hole. You may need to slightly enlarge the pilot hole or clear debris.
Signs of rust or corrosion appearing prematurely
While zinc-plated for corrosion resistance, extreme moisture or harsh chemicals can degrade the coating. Ensure bolts are used in appropriate environments. If the plating is scratched, it can expose the base metal. Consider touch-up paint or sealants for exposed areas if in a very corrosive environment.
Pros and Cons
Pros
- Excellent Corrosion Resistance: Zinc plating significantly extends the lifespan in various environments.
- Secure Timber Fastening: The square neck design ensures the bolt grips timber effectively, preventing rotation.
- Complete Kit: Each bolt includes a corresponding hex nut, saving time and ensuring compatibility.
- Strong and Durable: M8 size provides significant strength for demanding timber applications.
- Neat Finish: The smooth, domed head offers a clean, low-profile appearance on the fastened surface.
Cons
- Specific Application: Primarily designed for timber-to-timber fastening; not ideal for metal or other materials.
- Limited Thread Length: Only 100mm of the 160mm length is threaded, which might be a consideration for specific deep fastening scenarios where full threading is desired.
- Requires Pilot Hole: A pilot hole is necessary to seat the bolt properly, adding a step to the installation process.
Setup, Compatibility & Care
Setup
Setting up the Forgefix Carriage Bolt & Nut is straightforward but requires basic tools:
- Tools Required:
- Drill: With a wood drill bit matching or slightly larger than the bolt's diameter (e.g., 8-9mm for M8).
- Hammer or Mallet: For seating the square neck of the bolt into the timber.
- Spanner or Wrench: To tighten the hex nut (13mm for M8 nuts).
- Preparation: Ensure the timber pieces to be joined are clean and properly aligned. Mark the drilling points accurately.
Compatibility
- Materials: Exclusively designed and optimized for timber-to-timber fastening. While they can mechanically fasten other soft materials, their square neck feature is specifically for gripping wood.
- Size: M8 diameter and 160mm length are suitable for medium to thick timber sections. Ensure the length is appropriate for the combined thickness of your timber pieces, allowing enough thread for the nut.
Care
- Storage: Store bolts and nuts in a dry environment to maintain their zinc plating and prevent premature corrosion. The original bag is suitable for this purpose.
- Handling: Avoid scratching or damaging the zinc plating during installation, as this can compromise corrosion resistance.
- Reusability: If removed carefully and undamaged, these bolts can be reused. Inspect threads and plating before re-installation to ensure integrity.