Lost-Tite Screw - Gold - 3.5 x 49mm

In most applications, especially with softwoods, no pilot hole is necessary thanks to the self-drilling tip. For very dense hardwoods, a small pilot hole may be beneficial to prevent splitting.

The 'lost head' refers to the screw head design that sits flush or nearly flush with the surface of the material once installed, providing a discreet and clean finish compared to standard screw heads.

The product is described as suitable for 'indoor and light outdoor use.' For demanding or exposed structural applications outdoors, dedicated exterior-grade fasteners with superior corrosion resistance would be more appropriate.

The extra thread is designed to accommodate natural timber movement, such as shrinkage. It helps to prevent the screw from backing out or pushing its head proud of the surface if the wood contracts.

You will need an ST10 star drive bit (also known as a Torx bit) for these screws. A free driver bit is often included in the box.

Yes, compared to nails, panel pins, or glue, these screws are designed to be removable, allowing for easier disassembly or adjustments if needed.

They are suitable for hardwood, softwood, fibre board, and engineered and modified timber.

Ensure you are using the correct ST10 star drive bit and that it is fully engaged with the screw head. Avoid excessive force and ensure the drill/driver is set to an appropriate speed and torque setting.

While the screw is self-drilling, very dense hardwoods may benefit from a small, appropriately sized pilot hole. Ensure the pilot hole is not too large, as this can reduce holding power.

This is typically caused by timber shrinkage. The extra thread feature is designed to mitigate this. Ensure the screw is fully seated, and if the issue persists, consider the environmental conditions or timber type, as extreme fluctuations can still stress the connection.

Check for debris in the screw recess or on the timber surface. Ensure the timber is flat and free from imperfections where the screw is being driven. Verify the correct drive bit is being used to achieve full seating.