Roofing Screws 4.8x19mm (RAL 3005 Wine red) Self-drilling Metal to Metal Screws With Hexagon Head and Sealing washer, Lap Fixings for Tin Roofing, Stitching Corrugated Panels, Siding (250 pcs)

• Self-Drilling Roofing Screws (Tech Screws): Designed with a sharp self-drilling tip for fast, easy installation without the need for pre-drilling—perfect for securing tin roofing, corrugated panels, siding, and wall panels.
• Hex Head with EPDM Washer: The hexagonal head ensures maximum torque transfer for a tight fit, while the UV-resistant EPDM washer seals out moisture and protects against galvanic corrosion.
• Anti-Corrosion Protection: Coated with a durable 12 µm electro-galvanized zinc layer for superior rust resistance; ideal for both indoor and outdoor applications. Also available with SQ CERAMIC coating for higher corrosion categories (C1–C4).
• Versatile Expansion Lap Screws: Suitable for attaching sheet metal to steel substrates, mounting metal panel sidelaps (lap or stitch screw use), and installing façades, timber elements, and garage doors.
• Heavy-Duty Construction: Special hardening technology ensures these roofing screws are highly resistant to mechanical stresses and harsh weather, delivering long-term reliable performance in demanding environments.

Secure your metal roofing, siding, and wall panels with these heavy-duty self-drilling roofing screws. Designed for fast, reliable fixing of profiled sheets to steel structures, these tech screws (also known as stitch or lap screws) feature a sharp self-drilling tip, eliminating the need for pre-drilling and saving you installation time. The hexagonal head ensures excellent torque transmission with any standard wrench or driver, while the EPDM sealing washer creates a watertight seal to prevent leaks and protect against galvanic corrosion. Coated with a durable electro-galvanized zinc layer and available with a multi-layer ceramic SQ coating for higher corrosion resistance, these screws are ideal for demanding outdoor and industrial conditions. Key Features: Self-Drilling Tip: No pre-drilling required for fast metal-to-metal fixing. Hex Head Design: Strong torque transfer for secure and flush installation. EPDM Sealing Washer: Leak-proof sealing, protects against corrosion. High Corrosion Resistance: Durable 12 μm zinc coating; SQ CERAMIC option for harsher environments. Special Hardening: Increased strength and resistance to weathering. Applications: Mounting tin roofing and corrugated sheets Fastening siding and wall panels to steel substrates Securing metal panel sidelaps (lap/stitch applications) Suitable for industrial, agricultural, and residential projects Compatible Materials: Sheet metal Corrugated panels Hollow and profiled steel structures Metal siding and façades