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The Range£11.79Visit shop Unifix 5.5X80 Cross Recessed Countersunk Self Drill Cladding Screw - Gxghswd080 - Box Of 100 - Grey
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The Unifix 5.5X80 Cross Recessed Countersunk Self Drill Cladding Screw is engineered for contractors and DIY enthusiasts tasked with heavy-section cladding installations who need a reliable, time-saving fastener. Its primary benefit is the specialized self-drilling tip, which removes the requirement for pre-drilling holes into metal, significantly accelerating project timelines. While it excels in heavy-duty structural applications, users should note that the cross-recessed drive requires precise tool pressure to prevent potential cam-out when driving into denser materials.
| Colour | Grey |
|---|---|
| Model Part Number | 5014196677361 |
| Brand | Unifix |
No. The self-drilling tip is specifically engineered to pierce metal sections without a pilot hole.
A standard cross-recessed (Phillips) driver bit is required.
While these are designed for cladding and heavy metal sections, they will function in timber, but a standard wood screw is usually more cost-effective for that application.
The screws feature a standard protective coating suitable for most cladding applications, but extra protection should be added for high-moisture or coastal environments.
The countersunk head allows the screw to sit level with the cladding material, providing a clean, aesthetic finish that is flush with the surface.
Ensure you are using the correct bit size and applying steady, vertical pressure. Replace the drill bit if the tip is worn.
Use a center punch to create a tiny pilot dimple, or increase pressure during the first few seconds of drilling.
To achieve the best results, use a high-quality, hardened cross-head (Phillips) bit that fits the screw recess perfectly. Using a worn-out bit is the leading cause of screw head damage. Ensure your drill is set to the correct torque setting to avoid over-tightening, which could strip the threads or the head recess. While these screws are designed for heavy use, they should be stored in a dry environment to prevent premature corrosion. If installing in corrosive or coastal environments, consider applying a compatible sealant over the head to protect the drill site.
