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Power Tools Direct£48.72Visit shop Timco Silver Bmhw85 Metal Construction Timber To Heavy Section Screws - Countersunk - Wing-Tip - Self-Drilling - Exterior - Organic 5.5 X 85 Box 100
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B&Q£56.68Visit shop B&Q - Self-Drilling Wing-Tip Steel To Timber Heavy Section A2 Stainless Steel Bi-Metal Drill Screw5.5 X 85
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This guide is for builders, carpenters, and DIY enthusiasts needing to securely fasten wood to light section steel up to 5mm thick. The TIMCO 5.5 x 65mm self-drilling wing-tip screws offer a fast and efficient solution by combining drilling and tapping into a single operation, reducing labor and increasing productivity. A key consideration is the maximum drilling thickness of 5mm, which must not be exceeded for optimal performance.
| Colour | Silver |
|---|---|
| Model Part Number | BMLW65 |
| Brand | Timco |
These screws are designed for light section steel up to a maximum thickness of 5mm.
No, the self-drilling tip is designed to penetrate light steel sections (up to 5mm) without the need for pre-drilling.
The screws are suitable for timber sections ranging from 29mm to 43mm thick when fastening to light steel.
They are made from a Bi-Metal construction, featuring a hardened carbon steel drill tip fused to an A2-304 Austenitic Stainless Steel body.
Yes, the A2-304 stainless steel body provides good corrosion resistance suitable for many exterior applications.
The screw head has a Phillips recess.
The wings ream out the timber to allow the screw to achieve maximum RPM without burning out. They break off upon contact with metal, enabling the thread to self-tap.
Verify the steel section is within the 5mm maximum thickness limit. Ensure the self-drilling tip is sharp and not damaged. Increase drill speed slightly if necessary.
This may occur if the steel is too thick or too hard. Ensure you are using the correct drill speed. If the issue persists, pre-drilling a pilot hole in the steel might be necessary, although this deviates from the screw's intended use.
Ensure the timber thickness is within the 29-43mm range. If near the lower end or using very hard timber, consider a slightly slower drive speed or a pilot hole in the timber itself.
Ensure the correct Phillips drive bit is used and fully engaged. Use adequate downward pressure and avoid excessive speed, especially as the screw nears full depth.
Setup: To use these screws, you will need a Phillips drive bit compatible with the recess type. Ensure your drill or impact driver is set to a suitable speed; a variable speed drill is recommended to control penetration and avoid overheating. Drive the screw steadily, allowing the wings to clear the timber and the self-drilling tip to engage with the steel.
Compatibility: These screws are designed for use with light section steel (up to 5mm thickness) and timber sections between 29-43mm. They are compatible with standard Phillips head drivers. Ensure the material you are fastening into is within the specified thickness limits for optimal performance and to prevent damage to the screw or workpiece.
Care: Store screws in a dry environment to maintain the integrity of the A2-304 stainless steel coating. Avoid exposure to harsh chemicals that could degrade the protective layer. Clean any excess debris from the screw head after installation if a perfectly flush finish is critical.
