Unifix Coach Screws - M12 X 120 - Silver
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Product Information
Full details
This guide is for DIY enthusiasts and construction professionals seeking a reliable fastening solution for wood. The Unifix Coach Screws offer excellent grip and durability for structural projects, though their specific size may not suit all light-duty applications. Key features include a high-quality BZP finish for corrosion resistance, a hexagon head for easy installation, and durable construction for long-lasting performance.
All features
| Colour | Silver |
|---|---|
| Model Part Number | Hxc12 120 000 |
| Brand | Unifix |
Extended Product Information
FAQs
What is the primary use for these coach screws?
These M12 x 120mm coach screws are primarily designed for secure fastening in wood applications, especially for structural joints and heavy-duty connections.
What does BZP finish mean?
BZP stands for Bright Zinc Plating. It is a surface treatment that provides a bright, corrosion-resistant finish to the metal.
What tools are needed for installation?
A wrench or socket that fits the M12 hexagon head is required for installation. A drill for pre-drilling a pilot hole is also recommended.
Can these screws be used in masonry?
These screws are designed for wood. For masonry, you would typically need to use them with appropriate wall plugs or anchors, but they are not ideal for direct masonry fastening.
What does CE marking signify?
The CE marking indicates that the product conforms to European health, safety, and environmental protection standards, meeting requirements for sale within the European Economic Area.
Are these screws suitable for outdoor use?
Yes, the BZP finish provides good corrosion resistance, making them suitable for outdoor applications. However, continuous exposure to harsh weather may eventually affect the finish.
What is the difference between a coach screw and a lag screw?
Coach screws and lag screws are very similar, often used interchangeably. Both are wood screws with a hexagon head, designed for heavy-duty fastening. The term 'coach screw' often implies adherence to specific standards like DIN 571.
Troubleshooting
Screw not driving easily into wood
Ensure the pilot hole is adequately sized and not too small. Check for obstructions in the wood grain. Use a longer or more appropriately sized drill bit for the pilot hole.
Stripped hexagon head
Use the correct size socket or wrench. If the head is already stripped, specialized screw extractors may be needed. Avoid excessive force.
Corrosion on the screw
While BZP offers resistance, prolonged exposure to harsh conditions can cause minor surface rust. Clean gently with a soft brush and consider applying a protective coating if the screw is critical to structural integrity.
Pros and Cons
Pros
- Excellent corrosion resistance due to BZP finish.
- Easy to install with common tools.
- Provides strong and durable fastening for wood.
- Suitable for structural applications.
Cons
- The M12 x 120mm size is substantial and may be overkill for light-duty tasks.
- Primarily designed for wood; not suitable for masonry or metal without appropriate preparation/anchors.
- Requires a wrench or socket for installation, unlike self-tapping screws.
Setup, Compatibility & Care
Setup: To install, pre-drill a pilot hole in the wood slightly smaller than the screw's core diameter. Then, use a suitable wrench or socket to drive the hexagon head, securing the screw firmly into the wood. Ensure the connection is tight but avoid over-tightening, which could damage the wood or the screw.
Compatibility: These coach screws are specifically designed for use in wood. They can be used with wooden dowels or through-holes in timber. For certain applications, they might be used with appropriate wall plugs or anchors if fastening wood to other materials, though this is not their primary intended use.
Care: The BZP (Bright Zinc Plating) finish offers good corrosion resistance. To maintain this, avoid abrasive cleaners. Wipe down with a damp cloth if dirt accumulates. For extended outdoor use, periodic inspection for any signs of wear or corrosion is recommended.