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Bi-Metal Wing-Tip Screws for Timber to Heavy Section Steel
Bi-metal wing-tip self-drilling screws designed for fixing timber to heavy section steel, offering high corrosion resistance and strong drilling performance.
Timco Bi-Metal Wing-Tip Screws for Timber to Heavy Steel – 5.5mm x 120mm – Countersunk – Self-Drilling – Box of 100
In stock
£69.99 ex VAT(£83.99 inc VAT)
SKU:
BMHW120
Timco Bi-Metal Wing-Tip Screws for Timber to Heavy Steel – 5.5mm x 55mm – Countersunk – Self-Drilling – Box of 200
In stock
£77.49 ex VAT(£92.99 inc VAT)
SKU:
BMHW55
Timco Bi-Metal Wing-Tip Screws for Timber to Heavy Steel – 5.5mm x 65mm – Countersunk – Self-Drilling – Box of 200
In stock
£81.66 ex VAT(£97.99 inc VAT)
SKU:
BMHW65
Timco Bi-Metal Wing-Tip Screws for Timber to Heavy Steel – 5.5mm x 85mm – Countersunk – Self-Drilling – Box of 100
In stock
£47.99 ex VAT(£57.59 inc VAT)
SKU:
BMHW85
What are bi-metal wing-tip screws?
Bi-metal wing-tip screws are designed for fixing timber directly to heavy section steel without pre-drilling. The wing-tip design clears the timber during installation, allowing the screw to reach full drilling speed before tapping into the steel.
Why choose bi-metal wing-tip screws?
- Designed for fixing timber to steel up to 12mm thick
- Bi-metal construction for high corrosion resistance
- Stainless steel body with hardened drill tip
- Wing-tip prevents thread binding in timber
- Countersunk head provides a flush finish
How do wing-tip screws work?
Wing-tip screws use small cutting wings above the drill point to widen the hole in timber. This allows the screw to spin freely without the thread gripping too early.
When the screw reaches the steel, the wings break off. The drill point then cuts into the steel, and the thread forms a strong and secure fixing.
Where are they used?
These screws are commonly used for:
- Fixing timber battens to steel frames
- Timber to steel construction in exposed environments
- Roofing and cladding support systems
- Applications where corrosion resistance is important
Available Sizes & Typical Applications
| Size | Typical Use |
|---|---|
| 5.5 x 45mm | Light timber to steel fixing |
| 5.5 x 65mm | General timber to steel applications |
| 5.5 x 85mm | Fixing thicker timber sections |
| 5.5 x 100mm | Deeper penetration into timber and steel |
| 5.5 x 120mm | Heavy-duty timber to steel fixing |
When should you use bi-metal wing-tip screws?
Bi-metal wing-tip screws are the best choice for external or exposed environments where corrosion resistance is important. They are ideal for applications in urban, industrial, or higher moisture conditions where standard zinc screws may not offer sufficient protection.
Related Categories
- Zinc wing-tip screws: A cost-effective option for internal and low humidity environments.
- Self-drilling screws for heavy duty section steel: Explore more fixing options for heavy steel sections.
Frequently Asked Questions
What are bi-metal wing-tip screws used for?
They are used for fixing timber to steel where high corrosion resistance is required.
Do wing-tip screws need a pilot hole?
No – the self-drilling point allows them to cut into steel without pre-drilling.
What is the advantage of bi-metal screws?
They combine a stainless steel body with a hardened drill tip, providing both corrosion resistance and strong drilling performance.
Are bi-metal screws suitable for outdoor use?
Yes – they are designed for exposed environments and offer improved durability compared to standard zinc screws.
