TIMco C2 Clamp-Fix Multi-Purpose Screws - 4.0 x 25mm - Yellow

Timber jacking is the upward movement of timber caused by the screw thread. The TIMco C2 screws are engineered with a dual-angle thread and specific design features that counteract this lifting force, resulting in a more stable and flush connection.

A TX drive, also known as a Torx drive, is a type of screw head recess with a 6-pointed star shape. It offers superior torque transmission and resistance to cam-out compared to traditional Phillips or Pozidriv heads.

The high-molecular polymer lubricant coating significantly reduces the friction and torque needed to drive the screw, making installation faster and requiring less physical effort. It also enhances the screw's resistance to rust.

Yes, the advanced coating provides up to 20 times longer rust protection than standard zinc plating, making them suitable for demanding environmental conditions and outdoor timber projects.

No, you must use a TX drive bit that matches the size of the recess on the screw head. Using the wrong type or size of bit can damage the screw head and the bit, leading to cam-out.

The TIMco C2 Clamp-Fix Multi-Purpose Screws in the 4.0 x 25mm size are supplied in a box quantity of 200.

CSK stands for Countersunk. This indicates that the screw head is designed to sit flush with or below the surface of the material when driven into a pre-formed recess.

Ensure you are using the correct size TX drive bit and that it is fully seated in the screw recess. Apply firm, consistent pressure during driving.

While designed to minimize splitting, pre-drilling a pilot hole, especially in very hard woods or near the edge of timber, can prevent this. Ensure the twin-cut point is sharp and properly engaged before driving.

Check if the lubricant coating is intact. If debris has accumulated on the screw head or within the drive recess, clean it. Ensure the timber is not excessively dense for the screw size.

Verify that the TX drive bit is fully engaged and that you are not over-driving the screw. Ensure the timber surface is clean and even. The under-head ribs assist in countersinking; excessive force can strip the timber slightly.