Timco Heavy-Duty Self-Drilling Hex Screws, 5.5x65mm, Zinc, 100pcs

The Timco Heavy-Duty Self-Drilling Hex Screws are engineered for robust metal-to-metal applications, eliminating the need for pre-drilling in heavy-section steel up to 12mm thick. These screws feature a No.5 self-drilling point for effortless penetration, reducing installation time and labour.

Constructed from case & core hardened carbon steel with a zinc finish, they offer exceptional durability and corrosion resistance, making them ideal for demanding environments. The hex head design (8mm socket size) ensures a secure grip, while the 12mm fixed washer provides even load distribution to prevent material damage.

Key Benefits

• Self-drilling capability – Saves time by removing the need for pilot holes.
• High-strength material – Hardened carbon steel core resists shear and tensile stress.
• Zinc-plated finish – Guards against rust and extends service life.
• Secure fastening – Hex head with integrated washer for stability under load.

Technical Specifications

• Thread Diameter: 5.5 mm
• Length: 65 mm
• Effective Thread Length: 46 mm
• Max Drilling Thickness: 12.0 mm