Timco Heavy Duty Self-Drilling Hex Screws, Silver, 5.5x55mm (100pcs)

The Timco Heavy Duty Self-Drilling Hex Screws are designed for robust construction applications, allowing you to attach metal to heavy section steel (up to 12mm thick) without the need for pre-drilling. These high-performance screws feature an exterior plating that provides exceptional corrosion resistance, capable of withstanding 500 hours of salt-spray testing – making them ideal for outdoor and marine environments.

Crafted from case & core hardened carbon steel, these screws ensure strength and durability under demanding conditions. The self-drilling No.5 point eliminates the requirement for pilot holes, significantly reducing installation time and effort. The hex head design allows for easy tightening with standard tools, while the integrated fixed washer (12mm diameter) ensures a secure and flush fit.

Applications These screws excel in projects requiring strong metal-to-metal fastening, such as:

• Steel framing constructions
• Industrial metalwork
• Outdoor structural projects
• Marine and coastal applications
• Agricultural and automotive assemblies

Key Specifications

• Thread Diameter: 5.5mm
• Length: 55mm (36mm effective thread length)
• Drilling Capacity: 12mm maximum thickness
• Socket Size: 8mm hex

With their combination of durability, corrosion resistance and easy installation, Timco's self-drilling hex screws offer professional results for both industrial and commercial applications where reliable metal fastening is crucial.