Construction wood screw Koelner TS-3020 3x20 mm countersunk head TX drive

Koelner TS-3020 3x20 mm countersunk head TX drive is a construction wood screw designed for general carpentry and interior fastening tasks. With a nominal size of 3 x 20 mm and a conical countersunk head, the screw sits flush in wooden surfaces for clean joints and smooth finishes. The Torx (TX) drive provides positive engagement between driver and screw to reduce cam-out and allow reliable torque transfer during installation.

Advantages

This screw offers a combination of compact dimensions and a countersunk head suited to applications where a recessed finish is required. The TX drive reduces stripping risk and enables faster, more controlled screw insertion with compatible bits or drivers. Its thread form and length are intended to provide secure grip in typical soft and medium-density woods used in furniture, trim and framing.

Suitable for

• Furniture assembly and repair
• Interior wood trim and molding installation
• Fixing panels, battens and small wooden components

Key specifications

• Nominal size: 3 x 20 mm (diameter x length)
• Head type: Countersunk (conical) head for flush mounting
• Drive type: TX (Torx) drive for improved tool engagement
• Material and finish: Manufacturer-specified corrosion resistance and surface finish (refer to product label)
• Intended material: Wood (softwood and medium-density timber)

How to use

Pre-drilling is recommended where splitting is a concern, especially near edges or when working with hardwoods. Use a Torx bit or driver matching the screw's TX size and apply steady, moderate torque until the head sits flush with the surface. For repetitive fastening tasks, use a powered driver with adjustable torque to avoid overdriving. Verify the chosen screw length and diameter are appropriate for the material thickness and intended joint strength before installation.

Usage recommendations

For improved corrosion resistance in humid or outdoor environments, select a version with suitable coating or stainless material as specified by the manufacturer. Store fasteners in a dry place and use the correct Torx bit size to minimize head wear and ensure consistent fastening quality.