Timco Hex Head Self-Drilling Screws 5.5x25mm (100pc)

Timco Hex Head Self-Drilling Screws are designed for fast and efficient joining of roofing sheets to light section steel (up to 5.0 mm thick) without the need for pre-drilling. Their exterior plating provides exceptional durability and corrosion resistance, withstanding up to 500 hours of salt spray testing—ideal for outdoor applications. These screws also boast an A1 fire classification, ensuring safety compliance in construction projects.

The self-drilling No. 3 point eliminates the need for pilot holes, saving time and effort during installation. Made from case & core hardened carbon steel, these screws offer high strength and reliability. The fixed washer (12.00 mm diameter) ensures a secure fit and prevents over-tightening. The hex head design (8 mm socket size) provides excellent grip for power tools or manual installation.

Specifications:

• Material: Case & Core Hardened Carbon Steel
• Finish: Exterior (Silver Organic Coating)
• Thread Diameter: 5.5 mm
• Length: 25 mm
• Effective Thread Length: 13 mm
• Fixed Washer Diameter: 12.00 mm
• Point Type: Self-Drilling No. 3
• Socket Size: 8 mm (Hex Head)
• Max. Drilling Thickness: 5.0 mm
• Corrosion Resistance: 500 hours salt-spray tested
• Fire Classification: A1

With their durable, weather-resistant coating and high shear strength, these screws are perfect for roofing, cladding, and light steel frame construction.