Best current price£7.78from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£7.78Visit shop 5.5X25 Hex Head Self Drill Cladding Screw - Gxghs025b16 - Box Of 100 5014196677422
Visit shop
Debenhams£8.05Visit shop Unifix Unisex Silver 5.5X25 Hex Head Self Drill Cladding Screw - Box Of 100 In
Visit shop4 offers from £7.78 - £8.49
View price history by clicking the chart icon.
The Unifix 5.5X25 Hex Head Self Drill Cladding Screw is designed for contractors and DIY enthusiasts who need a reliable, high-performance fastener for heavy-duty cladding applications. Its primary benefit is the time-saving self-drilling tip, which eliminates the need for pilot holes in metal substrates; however, users should be aware that the 25mm length is best suited for thinner cladding profiles, so verify your material thickness before installation.
| Colour | Silver |
|---|---|
| Model Part Number | GXGHS025B16 |
| Brand | Unifix |
No, the self-drilling tip is specifically designed to eliminate the need for pilot holes in metal.
These are primarily designed for metal-to-metal or metal-to-timber cladding applications where a self-drilling function is required.
A power drill or impact driver fitted with a standard hex socket adapter is required.
The screws feature a durable, corrosion-resistant finish, though severe marine environments may require specific stainless steel grades.
This 25mm screw is designed for standard cladding gauges; refer to your material thickness specifications to ensure it matches the self-drilling capacity.
Apply more downward pressure initially or check if the metal substrate is too hardened or too thick for the screw point.
Ensure the socket bit is not worn and is fully seated on the hex head before applying high torque.
For optimal results, ensure your drill or impact driver is equipped with a high-quality hex socket bit that matches the screw head size. While the finish is corrosion-resistant, it is good practice to keep the fasteners in their original packaging until needed to prevent oxidation from moisture exposure. During installation, apply firm, steady pressure; if the drill bit struggles to penetrate, check that the metal thickness does not exceed the capacity of the self-drilling point. If you are working in highly corrosive or coastal environments, regularly inspect the cladding joints for signs of fastener movement or finish degradation.
