TIMco C2 Clamp-Fix Multi-Purpose Screws - 6.0 x 120mm - Yellow

You will need a T30 Torx (or TX30) screwdriver bit or driver head.

Yes, they feature enhanced rust protection (up to 20 times longer than standard zinc plating) making them suitable for outdoor applications where durability is important.

These screws are engineered specifically for timber-to-timber applications. For metal connections, specialized screws designed for that purpose would be more appropriate.

Timber jacking is when timber lifts or separates as a screw is driven. The dual-angle thread design and patented twin-cut technology of these screws help to minimize this effect by providing consistent clamping force and reducing stress on the timber.

Each box contains 100 screws.

The twin-cut point is designed for rapid pick-up and to reduce timber splitting, often eliminating the need for pre-drilling. However, in very hard or dense timbers, pre-drilling a pilot hole can still make insertion easier.

The high-molecular polymer coating significantly reduces insertion torque by up to 52%, allowing for easier and faster driving with less effort and less risk of cam-out.

Ensure you are using a T30 driver bit of good quality and that it is fully seated in the screw recess. Apply firm, consistent pressure directly in line with the screw.

While designed to prevent splitting, very brittle or knotty timber may still split. Try reducing driving speed or pre-drilling a pilot hole. Ensure the screw is not being over-tightened.

Verify that your drill/driver is set to an appropriate torque setting. The polymer coating significantly reduces torque, but extremely dense woods may still require higher power. Ensure the T30 bit is properly engaged.

Check the timber surface for irregularities. For a perfectly flush finish, ensure the countersunk head has a clean recess to sit in. You may need to slightly enlarge the countersink area if the timber is too soft.