Timco Bi-Metal Hex Head Self-Drilling Screws 5.5x70mm (100pk)
100x hex head self-drilling screws for roofing & light steel. A2-304 stainless with carbon steel tip, no pre-drill needed.
The Timco Bi-Metal Hex Head Self-Drilling Screws provide a high-performance fastening solution for light section steel and roofing sheet applications. These screws eliminate the need for pre-drilling, saving valuable time and effort during installation.
Constructed with a hardened carbon steel drill tip fused to an A2-304 austenitic stainless steel body, these screws offer excellent durability and corrosion resistance, making them ideal for exterior applications. The bi-metal construction combines the strength of carbon steel with the rust-resistant properties of stainless steel.
Key Features
- Self-drilling design – No pre-drilling required, suitable for steel up to 5.0mm thick
- High corrosion resistance – A2-304 stainless steel body for exterior use
- Hex head with fixed washer – Provides a secure grip for power tools (8mm socket size)
- Strong bi-metal construction – Hardened carbon steel tip for efficient drilling
These screws are perfect for fastening roofing sheets to light steel sections, ensuring a strong and weather-resistant connection. With their durable build and efficient threading (57mm effective thread length), they provide long-lasting performance in demanding environments.
- Joining roofing sheets to light section steel
- Exterior construction applications
- Metal framing and cladding
- Thread Diameter: 5.5mm
- Length: 70mm
- Head Type: Hex
- Fixed Washer Diameter: 11.00mm
- Point Type: Self-Drilling No.3
- Socket Size: 8mm
- Material: Bi-Metal (A2-304 Stainless Steel/Carbon Steel)
- Effective Thread Length: 57mm
- Max Drilling Thickness: 5.0mm
Always follow local regulations and product guidance. Use appropriate PPE.
Free standard delivery on US mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For defective items, contact us within 14 days for a replacement or refund.
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