Timco Self Drilling Screws – Light Steel – Exterior Bi-Metal – Hex Head with EPDM Washer – 5.5mm x 100mm – Box of 100

These Timco bi-metal self drilling screws fix roofing sheets directly to light section steel up to 5.0mm. Because of the hardened No.3 drill point, they cut through steel quickly and remove the need for pre-drilling.

At the same time, the A2-304 stainless steel body provides excellent corrosion resistance. This combination gives you both fast drilling performance and long-term durability. As a result, these bi metal self drilling screws are ideal for external and exposed environments.

The 16mm EPDM washer compresses during installation. Therefore, it creates a watertight seal that helps prevent water ingress. In addition, the hex head design improves drive control and reduces slippage when fixing.

Key Features

• Bi-metal construction with A2-304 stainless steel body
• Hardened carbon steel No.3 drill point
• EPDM washer creates a watertight seal
• Designed for light steel up to 5.0mm
• 60° self-tapping thread for secure fixing
• Fully threaded for strong hold
• Corrosion Rating 4 for outdoor environments

Typical Applications

• Roofing sheets to light steel
• Cladding installations
• External metal-to-metal fixing
• Construction projects exposed to the elements

These screws are manufactured for steel substrates and provide reliable performance in urban and industrial environments with moderate salt exposure.