Construction Wood Screw Koelner TS-6090 6x90 mm, Countersunk Head, TX Drive

Koelner TS-6090 6x90 mm is a construction wood screw with a countersunk (conical) head and TX (Torx) drive designed for secure fastening of timber elements. The 6 mm diameter and 90 mm length make it suitable for connecting medium to thick wooden components where a flush surface is required. The conical head allows the screw to sit level with the material surface after installation, while the TX drive reduces cam-out and enables efficient torque transfer when using compatible Torx bits.

Advantages

The countersunk head provides a neat, recessed finish and minimizes interference with adjacent components. The TX drive improves bit engagement and reduces the risk of stripping, allowing faster and more reliable installation with power drivers. The 6x90 mm dimensions offer sufficient penetration and grip for common construction timber joints and framing tasks. The screw is suitable for repetitive use in carpentry and structural applications where consistent seating and holding power are required.

Suitable for

• Fixing joists, studs and beams in timber framing
• Securing decking boards and exterior wooden cladding when a flush head is preferred
• Joining laminated, treated or solid wood components in construction
• Furniture and joinery applications that require countersunk fasteners

Key specifications

• Diameter: 6 mm
• Length: 90 mm
• Head type: Countersunk (conical) head for flush seating
• Drive type: TX (Torx) drive for improved bit engagement
• Intended material: Wood and timber components

How to use

Select a Torx bit compatible with the TX drive and a driver capable of delivering appropriate torque for 6x90 mm screws. For hardwoods or dense timber, pre-drilling a pilot hole slightly smaller than the screw core diameter is recommended to prevent splitting and to ensure correct seating of the countersunk head. Drive the screw until the head is flush with the wood surface; avoid over-tightening to prevent head damage or compression of the surrounding material.

Usage recommendations

When used in exterior or treated timber, consider corrosion protection and compatibility with the screw finish; use screws with appropriate corrosion resistance for long-term outdoor exposure. Store screws in a dry environment to maintain condition and ensure consistent performance during installation.