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Stainless Self-Drilling Screws for Heavy Duty Steel
Bi-metal self-drilling screws for fixing into heavy section steel up to 12mm. Designed for high corrosion resistance and strong drilling performance.
Timco Bi-Metal Heavy Section Steel Screws – Self-Drilling – Hex – 5.5mm x 55mm – Box of 100
In stock
£38.58 ex VAT(£46.29 inc VAT)
SKU:
BMH55
Timco Bi-Metal Heavy Section Steel Screws – Self-Drilling – Hex – EPDM Washer – 5.5mm x 38mm – Box of 100
In stock
£37.66 ex VAT(£45.19 inc VAT)
SKU:
BMH38W16
Timco Bi-Metal Heavy Section Steel Screws – Self-Drilling – Hex – 5.5mm x 38mm – Box of 100
In stock
£33.66 ex VAT(£40.39 inc VAT)
SKU:
BMH38
What are bi-metal self-drilling screws?
Bi-metal self-drilling screws are specialist fixings designed for drilling into thick steel without pre-drilling. They feature an A2-304 stainless steel body for corrosion resistance and a hardened carbon steel drill tip for strength and performance.
This combination makes them ideal for demanding external applications where both durability and drilling capability are required.
Why choose stainless self-drilling screws?
- A2 stainless steel body for excellent corrosion resistance
- Hardened carbon steel drill tip for drilling into steel up to 12mm
- No pre-drilling required, saving time on site
- Ideal for exposed and demanding environments
- Strong, secure fixing in heavy duty steel applications
Where are bi-metal screws used?
These screws are used where metal needs to be fixed into thick steel sections, particularly in environments where corrosion resistance is important.
- Structural steel and fabrication
- Roofing and cladding systems
- Industrial and commercial buildings
- External steel installations
- Heavy-duty metal-to-metal fixing
Available Sizes & Options
| Size | Type | Typical Use |
|---|---|---|
| 5.5 x 38mm | Standard | Metal-to-metal fixing into heavy section steel |
| 5.5 x 38mm | With EPDM Washer | External applications requiring a watertight seal |
| 5.5 x 55mm | Standard | Fixing thicker materials or multi-layer steel sections |
Designed for heavy section steel
These screws are designed for fixing into heavy section steel up to 12mm thick. The hardened drill tip allows efficient drilling, while the stainless steel body helps protect against corrosion in exposed environments.
Shop Heavy Duty Self-Drilling Screws
Browse our range of stainless self-drilling screws for heavy duty steel applications, offering reliable performance for structural, roofing, and cladding work.
Stainless Self-Drilling Screws FAQs
What are stainless self-drilling screws?
These are bi-metal screws with a stainless steel body and hardened drill tip, designed for drilling into steel without pre-drilling.
Can stainless self-drilling screws drill into thick steel?
Yes, heavy duty versions are designed to drill into steel up to 12mm thick.
Why use bi-metal screws instead of standard coated screws?
Bi-metal screws offer better corrosion resistance, making them ideal for exposed or demanding environments.
Do I need to pre-drill these screws?
No, the self-drilling point allows drilling and fixing in one step.
