Timco Heavy-Duty Self-Drilling Hex Screws, 5.5x65mm, Zinc, 100pcs
Heavy-duty self-drilling screws for metal (12mm max). Zinc-plated carbon steel, hex head, 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
Technical Specifications
- Attaching metal to heavy-section steel (≤12mm)
- Structural steelwork
- Industrial fabrication
- Metal roofing/cladding
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- Thread Diameter: 5.5 mm
- Length: 65 mm
- Head Type: Hex
- Fixed Washer Diameter: 12.00 mm
- Point Type: Self-Drilling No.5
- Socket Size: 8 mm
- Finish: Zinc
- Material: Case & Core Hardened Carbon Steel
- Effective Thread Length: 46 mm
- Max Drilling Thickness: 12.0 mm
- Weight: 1060 g
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