Wood screw Koelner/Rawlplug TS-6140 6x140 mm, countersunk head, TX drive

Koelner/Rawlplug TS-6140 6x140 mm is a wood construction screw with a countersunk head and TX (Torx) drive designed for secure fastening of timber and structural wooden elements. The 6 mm diameter and 140 mm length provide deep threaded engagement for load-bearing connections in carpentry and construction applications, while the countersunk head allows the screw to sit flush with the wood surface when countersunk. The TX drive reduces cam-out and enables higher torque transfer compared with slotted or Phillips drives, simplifying installation with compatible Torx bits.

Advantages

The screw’s 6x140 mm dimensions deliver reliable penetration and withdrawal resistance for joining thick timber members and multilayer wooden assemblies. A countersunk head gives a clean finish and facilitates surface-level fastening without protrusions. The TX drive improves bit retention and torque application, reducing the risk of stripping during driving. Materials and coating are chosen for construction use, providing corrosion resistance suitable for interior and some protected exterior wooden structures where covered or painted fasteners are acceptable.

Suitable for

• Structural timber connections in carpentry and roof construction
• Fixing joists, beams and posts
• Joining thick decking boards and exterior cladding (in covered applications)
• Wooden frames and heavy-duty joinery

Key specifications

• Diameter: 6 mm
• Length: 140 mm
• Head type: countersunk (flat) head for flush installation
• Drive type: TX (Torx) for improved torque transfer and reduced cam-out
• Application: timber and structural wood fastening

How to use

Select a compatible TX (Torx) bit and a drill or driver capable of controlled torque. For clean and precise results, pre-drill pilot holes appropriate for 6 mm screws in dense or split-prone timber, following recommended pilot hole diameters for the wood species and screw size. Countersink the hole if a flush finish is required. Drive the screw steadily until the countersunk head sits level with the wood surface; avoid over-torquing which can weaken the joint or damage the screw head. For repetitive work, use a depth stop or clutch setting on the driver to ensure consistent seating.

Usage recommendations

Use the Koelner/Rawlplug TS-6140 screws in compatible structural timber applications and follow local building codes for connection design. For outdoor exposed installations choose fasteners and coatings specified for full exterior exposure. Store screws in a dry place to preserve coating integrity and inspect driver bits regularly to prevent damage to TX recesses.