Wood screw Koelner/Rawlplug TS-4025 4×25 mm, countersunk head, TX drive

Koelner/Rawlplug TS-4025 is a 4×25 mm wood screw with a countersunk conical head and a TX (Torx) drive designed for secure fastening of wooden elements. The screw geometry and drive type allow effective torque transfer and reduced cam-out, while the countersunk head provides a flush finish when installed. It is intended for general carpentry, furniture assembly and interior woodwork where a neat surface and reliable mechanical connection are required.

Advantages

The countersunk conical head sits flush with the workpiece for a smooth surface and easy finishing. The TX drive offers improved engagement with the driver bit, enabling higher torque transmission and reduced risk of stripping. The 4×25 mm dimensions make it suitable for thin-to-moderate thickness wood panels and components, providing stable clamping without protrusion. The screw design supports consistent performance in typical construction and joinery tasks.

Suitable for

• Furniture assembly and fittings
• Interior woodwork and trim
• Fixing thin wooden panels and battens
• Small carpentry and repair tasks

Key specifications

• Diameter: 4 mm
• Length: 25 mm
• Head type: Countersunk (conical)
• Drive type: TX (Torx)
• Material characteristics: suitable for wood fastening applications

How to use

Select a TX driver bit that matches the screw drive size and set the power tool or manual driver to an appropriate torque setting for 4 mm wood screws. For dense hardwoods, consider pre-drilling a pilot hole to prevent splitting; for softwoods and thin panels, driving directly is often acceptable. Drive the screw until the head is flush with the surface, taking care not to over-torque which can damage the head, driver bit, or workpiece. When a fully concealed finish is required, countersink the hole to accommodate the head depth before fastening.

Usage recommendations

Use appropriate corrosion-resistant coatings or select compatible fasteners if the application involves high humidity or exterior exposure. Store screws in a dry environment and use the correct TX bit size to ensure efficient installation and to minimise driver wear.