Timco Bi-Metal Heavy Section Screws, Self-Drilling, 5.5x55mm (100pc)
Timco heavy-duty bi-metal self-drilling screws (5.5x55mm). No pre-drilling required, ideal for steel up to 12mm thick.
The Timco Bi-Metal Heavy Section Screws provide exceptional fastening performance for attaching metal to heavy section steel (up to 12mm thick) without requiring pre-drilled holes. Their self-drilling tip ensures quick and efficient installation, saving time and effort.
These screws feature a hardened carbon steel drill tip fused onto an A2-304 austenitic stainless steel body, offering excellent corrosion resistance and durability. The hex head design ensures secure fastening with minimal cam-out, while the fixed washer provides consistent clamping force and surface protection.
Key Features:
- Bi-Metal Construction – Combines a carbon steel drill tip with a stainless steel body for maximum performance
- Self-Drilling No.5 Point – Eliminates the need for pre-drilling
- Hex Head with 8mm Socket Size – Easy to drive with power tools
- Fixed Washer (11mm Diameter) – Ensures proper load distribution
- Effective Thread Length (34mm) – Provides strong holding power
Ideal for exterior applications where corrosion resistance and high-strength fastening are essential, these M5.5 x 55mm screws are supplied in a pack of 100, making them perfect for professional and heavy-duty use.
- Shipped within 0-2 business days
- Shipping to United States: 3-5 business days*
- Free Shipping Included
- Attaching metal to heavy section steel
- Exterior applications requiring corrosion resistance
- Construction and industrial projects
- Fastening without pre-drilling
- Thread Diameter: M5.5mm
- Length: 55mm
- Head Type: Hex
- Fixed Washer Diameter: 11.00mm
- Point Type: Self-Drilling No.5
- Socket Size: 8mm
- Material: Bi-Metal (A2-304 Stainless Steel & Carbon Steel)
- Effective Thread Length: 34mm
- Max Drilling Thickness: 12.0mm
- Pack Quantity: 100 pieces
- Weight: 895g
Always follow local regulations and product guidance.
Free standard delivery on US mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For defective items, contact us within 14 days for a replacement or refund.
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