Pro-Bolt Dome Head Alloy Bolts - M4 x 0.50mm x 8mm Purple
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Product Information
Full details
The Pro-Bolt Dome Head Alloy Bolts are designed for enthusiasts seeking a lightweight and visually appealing alternative to standard fasteners, particularly for non-safety critical areas like bodywork and plastics. They offer significant weight reduction and a premium anodised finish, but require careful torque application due to their softer material. This guide covers their features, usage, and maintenance.
All features
| Colour | Purple |
|---|---|
| Model Part Number | AWFFB412-5P |
| Brand | Pro-Bolt |
Extended Product Information
FAQs
What is the primary benefit of using Pro-Bolt Dome Head Alloy Bolts?
The primary benefit is significant weight reduction compared to traditional steel or titanium bolts, along with an attractive, durable anodised finish for aesthetic customization.
Can these bolts be used for critical engine components?
No, these bolts are made from aluminium and are not suitable for safety-critical applications or high-stress areas due to their material properties. They are intended for bodywork, plastics, and other non-critical components.
How do I know which torque setting to use?
Refer to the torque guide provided in the 'Setup, Compatibility & Care' section. It lists maximum torque values in Newton-metres (NM) and foot-pounds (ft/lbs) for different thread diameters (M4 to M8).
What happens if I overtighten an alloy bolt?
Overtightening aluminium bolts can easily strip the threads or damage the bolt head, as aluminium is a softer material than steel. Always use a torque wrench and the recommended settings.
How should I clean and care for the anodised finish?
Clean with a soft, damp cloth and mild soap. Avoid abrasive cleaners, solvents, or wire brushes, which can damage the anodised coating. Rinse with water and dry thoroughly.
Are these bolts stronger than stainless steel bolts?
No, aluminium alloy bolts are significantly lighter but generally not as strong or hard as stainless steel bolts. Their advantage lies in weight saving and appearance, not in higher tensile strength.
What does '7075T73' material specification mean?
7075T73 is a high-strength aluminium alloy known for its excellent strength-to-weight ratio, making it a popular choice for applications where lightness and durability are important, such as in aerospace and performance components.
Troubleshooting
Bolt head strips during tightening
You have likely exceeded the recommended torque setting. Use a torque wrench and ensure you are using the correct value for the bolt's thread diameter. If the head is already damaged, the bolt may need to be carefully removed using specialized tools.
Anodised colour fades or discolours
Exposure to harsh chemicals, UV light, or prolonged contact with certain substances can affect the anodised finish. Clean gently with mild soap and water. Avoid harsh cleaning agents. For significant fading, replacement may be necessary.
Bolt feels loose after installation
Ensure the bolt was tightened to the correct torque specification. Check for any damage to the threads on the bolt or in the receiving hole. Make sure you are using the correct size bolt for the application.
Bolt corrodes
While resistant to mild corrosion, prolonged exposure to aggressive chemicals or saltwater without cleaning can eventually impact the finish. Clean regularly with mild soap and water and dry thoroughly.
Pros and Cons
Pros
- Significantly reduces weight compared to steel or titanium bolts.
- Attractive, corrosion-resistant anodised finish in various colours.
- Ideal for cosmetic upgrades on bodywork, plastics, and non-critical components.
- High-quality material (7075T73 aluminium alloy) for durability.
- Available in a range of thread sizes and lengths.
Cons
- Not suitable for safety-critical applications or high-stress areas.
- Requires careful attention to torque settings to avoid stripping or damage.
- Aluminium is softer than steel, making it more susceptible to overtightening damage.
- Anodised finish can be damaged by harsh abrasives or aggressive cleaning agents.
- More expensive than standard steel bolts.
Setup, Compatibility & Care
Setup and Torque:
These bolts are designed as direct replacements for existing fasteners in non-safety critical areas. Ensure you select the correct thread diameter (M4, M5, M6, M8) and length for your application. Crucially, adhere to the recommended maximum torque settings to avoid stripping the threads or damaging the bolt head.
| Thread Diameter | Max Torque (NM) | Max Torque (ft/lbs) |
|--------------------------------------------------------------------|
| M4 | 1.20 | 0.88 |
| M5 | 2.50 | 1.84 |
| M6 | 5.00 | 3.69 |
| M8 | 10.00 | 7.38 |
Compatibility:
Suitable for use in aluminium, plastic, and composite materials where original fasteners are of similar thread size. Not suitable for high-stress or safety-critical applications. Always verify the original bolt's function and location before replacement.
Care:
To maintain the anodised finish, clean the bolts with a soft, damp cloth and mild soap. Avoid abrasive cleaners, solvents, or wire brushes, as these can scratch the surface and damage the anodising. For best results, rinse with clean water and dry thoroughly.