LAMPS support Need help before you order? Product choice, alternatives and trade purchasing. Branch support Local teams for collection, advice and support. Technical help Ask about alternatives, accessories and project requirements. Trade ready VAT invoices and trade account support available. Warranty Warranty details follow the manufacturer terms for this product. Ask LAMPS Description Specifications Data Sheets Delivery The GSE Self-Tapping Screw with Washer is designed to provide a reliable, secure fastening solution for in-roof solar PV systems. Specially crafted for compatibility with GSE in-roof mounting systems, this self-tapping screw allows for quick and effective installation directly into the mounting surface, reducing installation time and ensuring a strong, stable hold. Each screw is equipped with a durable washer, enhancing weather resistance by creating a watertight seal that protects against moisture ingress. This makes it a perfect choice for installers who prioritise long-term stability and protection in their solar projects. Quick & Reliable Fastening Self-Tapping Design: Simplifies installation, allowing direct insertion without the need for pre-drilling Secure Hold: Provides a firm grip to keep solar panels securely mounted, even in adverse weather conditions Ideal for GSE Systems: Compatible with GSE in-roof solar mounting systems for streamlined installation Durable & Weather-Resistant Washer Included: Each screw includes a durable washer for added weather protection, creating a watertight seal Built to Last: Engineered to withstand the UK climate, ensuring longevity and reducing maintenance needs Corrosion Resistant: Made from high-quality materials to prevent rust and corrosion over time Technical Specifications Type: Self-Tapping Screw with Washer Compatibility: Designed for use with GSE in-roof solar PV mounting systems Weather Resistance: Provides excellent sealing to prevent water ingress Durability: Constructed for long-lasting performance in a range of environmental conditions Why Choose the GSE Self-Tapping Screw with Washer? The GSE Self-Tapping Screw with Washer is a valuable addition to any in-roof solar installation, providing the secure fastening and weatherproofing needed for long-term, reliable performance. Its ease of installation, combined with durable weather resistance, makes it an essential accessory for achieving a stable and watertight solar PV system. Perfect for professional installers, this screw and washer combination ensures peace of mind for any solar project. No data sheets or downloads available for this product. Delivery options Standard parcel delivery — tracked courier, typically 1–2 working days to UK mainland. Ideal for chargers, accessories and smaller solar components. Pallet delivery — for bulkier items such as multi‑panel solar kits or commercial chargers. Typically 2–3 working days, kerbside as standard; 24/48‑hour services on request. Collection — collect from our Oxfordshire distribution hub by appointment. Please contact us before travelling so we can confirm stock is ready. Lead times We dispatch Monday to Friday (excluding bank holidays). Stocked items ordered before our warehouse cut‑off are dispatched same day where services allow. Back‑order items are clearly flagged with estimated lead times. Exact services and pricing are confirmed at checkout. Delivery area UK mainland addresses only. We are unable to ship to Northern Ireland, Republic of Ireland, Isle of Wight, Isle of Man or the Channel Islands. Please report any damages or shortages within 48 hours of delivery. Read full delivery & returns details Trade customer? Open online pricing is available, but if you need account support, branch collection, project quantities or renewables supply help, start a trade conversation with LAMPS. Register trade interest Full trade account application Common installation accessories Solar Inverters Solar Batteries Related products GSE In-Roof Mounting System - Portrait 1650x1135mm £21.89 ex VAT £26.27 inc VAT Add to Cart GSE Rooflex Grey 330 Waterproofing Strip - 5m for In-Roof Solar Panels £48.00 ex VAT £57.60 inc VAT Add to Cart GSE Black End Clamp H16 with EPDM Seal £1.68 ex VAT £2.02 inc VAT Add to Cart GSE Black Double Mid Clamp H16 with EPDM Seal £1.86 ex VAT £2.23 inc VAT Add to Cart Trusted by LAMPS customers 5.0 out of 5 66+ customer reviews "I ordered the Ohme Home Pro 5m Smart EV Charger from LAMPS as they offered the best price online. From the initial order to the product arriving within a few days it was effortless." "I recently ordered a SolarEdge Home Wave SE3680 inverter and compatible wifi antenna to replace a faulty older inverter. Good price, quick delivery and excellent customer service." Read latest customer reviews Leave a Google review
GSE Rooflex Grey 330 Waterproofing Strip - 5m for In-Roof Solar Panels £48.00 ex VAT £57.60 inc VAT Add to Cart
"I ordered the Ohme Home Pro 5m Smart EV Charger from LAMPS as they offered the best price online. From the initial order to the product arriving within a few days it was effortless."
"I recently ordered a SolarEdge Home Wave SE3680 inverter and compatible wifi antenna to replace a faulty older inverter. Good price, quick delivery and excellent customer service."
