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Power Tools Direct£5.45Visit shop Techfast Light Tfhuwsd5545l Roofing Screw - Sheet To Steel (No Washer) - Duty 5.5 X 45Mm (Box Of 100)
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B&Q£9.46Visit shop B&Q - Tfhuwsd5545L Techfast Roofing Sheet To Steel Hex Screw No.3 Tip 5.5 X 45mm Box 100 Fortfh5545L
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The Forgefix TechFast Roofing Sheet to Steel Hex Screw is a professional-grade fastener designed for contractors and DIY enthusiasts looking to secure metal roofing panels to light gauge steel frames. These screws provide exceptional durability through an advanced Elementech corrosion-resistant coating that withstands up to 1000 hours of salt spray testing. While they offer robust performance and fire resistance, users should note that this specific 5.5 x 45mm variant is supplied without a washer, making them best suited for applications where an external sealing washer is either provided separately or not required by the building design.
| Colour | Grey |
|---|---|
| Model Part Number | TFHUWSD5545L |
| Brand | Forgefix |
No, these are specifically engineered for light gauge steel and will not hold effectively in wood.
These screws require an 8mm hex socket bit.
No, this specific item (TFHUWSD5545L) is supplied without washers.
They are designed for light gauge steel up to a maximum thickness of 5mm.
Yes, they feature a high-performance Elementech coating tested to 1000 hours of salt spray, offering excellent durability.
Check that the steel thickness is within the 5mm limit and ensure you are applying consistent, firm downward pressure.
Verify that your hex socket is exactly 8mm and is not worn down; replace the bit if it shows signs of rounding.
Ensure that the coating was not stripped off by using the incorrect drive speed or a damaged driver bit.
To ensure the best results, use an 8mm hex magnetic driver bit to prevent the screw from slipping during installation. These screws are designed for steel frames up to 5mm thick; using them on thicker steel may cause the drill point to dull or break prematurely. For maintenance, periodically inspect the fastening points for signs of corrosion or movement, especially in coastal or high-humidity environments. If a moisture-tight seal is required for roofing, ensure you apply a compatible EPDM or rubber-backed washer before fastening, as these units are sold as bare screws.
