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Power Tools Direct£11.20Visit shop Timco Dsn75lb Drive Screws - Galvanised 75 X 5.40
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B&Q£18.44Visit shop B&Q - TimcoDrive ScrewsGalvanised (Size 75 X 5.402.5 Kilograms)
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These TIMCO drive screws are ideal for professional contractors and DIY enthusiasts tasked with securing roofing or cladding sheets to timber purlins. Engineered with a durable galvanised steel finish, they offer reliable medium-duty rust protection for outdoor environments, though users should ensure they are not used in highly corrosive coastal areas without additional protective treatments.
| Colour | Grey |
|---|---|
| Model Part Number | DSN75LB |
| Brand | TIMCO |
No, these are specifically designed for fixing sheets to timber purlins.
While these can be driven directly, pre-drilling is recommended if you are working close to the edge of the timber to prevent splitting.
The medium-duty galvanised coating is best for standard outdoor conditions; for high-salt coastal environments, stainless steel fixings are recommended.
With approximately 55 pieces per kilogram, a 2.5kg pack contains roughly 135-140 screws.
Yes, they conform to Eurocode 5 and service class 2 standards for construction projects.
Check if the pilot hole is too large or if the timber purlin is excessively degraded.
Ensure the screw head was not damaged during the driving process, which can expose the underlying steel; touch up with a galvanised spray if necessary.
Verify the hammer weight is sufficient and ensure you are striking squarely to maintain the screw's alignment.
For optimal results, ensure the timber purlins are structurally sound and free from excessive rot before installation. Since these are drive screws, they are intended to be hammered into position, allowing the threaded design to bite into the timber for a firm grip. When installing, ensure the screw head sits flush against the sheet to prevent water ingress. Keep the screws in their original packaging in a dry, covered area to prevent moisture accumulation on the galvanised coating before use. If you are working in an area with high rainfall, consider using compatible rubber washers to ensure a complete watertight seal at the penetration point.
