Diall Hex Coach Screw - Silver
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B&QB&Q - Hex Zinc-Plated Carbon Steel Coach Screw (Dia)8mm (L)80mmPack Of 10
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Product Information
Full details
The Diall Hex Coach Screw in Silver is designed for DIY enthusiasts and professionals who require a robust, heavy-duty fastening solution for timber and metal construction projects. These screws offer excellent holding power and a clean, uniform finish, making them ideal for framing, decking, and structural assembly; however, they require pre-drilling in hardwoods to prevent splitting or fastener shear.
All features
| Colour | Silver |
|---|---|
| Brand | Diall |
Extended Product Information
FAQs
Do I need to pre-drill holes before using these screws?
Yes, pre-drilling is highly recommended, especially in hardwoods, to prevent the timber from splitting.
Can these screws be used in metal?
They are designed for fastening metal components to timber, typically by passing through a pre-drilled metal plate into the wooden base.
What tool should I use to drive these screws?
A socket wrench, spanner, or a power drill with a compatible socket attachment is ideal.
Are these screws suitable for coastal outdoor environments?
While the silver finish is durable, users in high-salt coastal areas should consider stainless steel fasteners to prevent long-term surface corrosion.
What is the primary advantage of the hex head?
The primary advantage is the ability to apply high levels of torque without the tool slipping out of the head.
Troubleshooting
Screw is difficult to drive into the timber
Ensure a pilot hole has been drilled. If the wood is very hard, increase the diameter of the pilot hole slightly.
Hex head is rounding off during installation
Check that the socket size matches the head perfectly and ensure the tool is seated squarely before applying torque.
Timber is splitting near the edge
Increase the distance from the edge of the board when placing your pilot hole or reduce the size of the screw shank.
Pros and Cons
Pros
- High torque capacity with hex head
- Suitable for both metal and timber surfaces
- Provides a secure, heavy-duty hold
- Clean silver aesthetic for visible hardware
Cons
- Requires pre-drilling for optimal results in dense hardwoods
- Not intended for fine, finish-carpentry applications
- Requires manual or powered socket tools for installation
Setup, Compatibility & Care
To achieve the best results, always measure the thickness of your material to select the correct screw length. We strongly recommend using a drill bit with a diameter slightly smaller than the core of the screw to create a pilot hole, especially when working with dense, seasoned timber. Ensure that your socket set or wrench fits the hex head snugly to avoid rounding the edges of the fastener. To maintain the silver finish and prevent corrosion in outdoor settings, avoid using impact drivers on high-torque settings, as this can strip the protective coating.