Wood screw Koelner/Rawlplug TS-4030 4x30 mm conical head, TX drive

Koelner/Rawlplug TS-4030 wood screw, size 4x30 mm, features a conical (countersunk) head and a TX (Torx) drive. It is designed for fastening wooden elements where a flush surface is required, providing a neat finish for visible joinery and interior fittings. The screw’s thread and geometry are intended to deliver consistent engagement in both softwoods and hardwoods when used with appropriate pilot holes or pre-drilling.

Advantages

The conical head allows the screw to sit flush with or below the wood surface for a smooth finish, while the TX drive reduces cam-out and enables higher torque transfer compared with slotted or Phillips drives. The 4x30 mm dimensions make this screw suitable for medium-duty connections in furniture assembly, carpentry and interior fittings. Its thread form and length are balanced to provide reliable holding power in timber substrates when installation follows standard woodworking practice.

Suitable for

• Furniture assembly and repairs
• Joining wooden panels and boards
• Interior carpentry and trim work
• Mounting fixtures and fittings to wooden substrates

Key specifications

• Length: 30 mm
• Diameter: 4 mm
• Head type: conical (countersunk)
• Drive type: TX (Torx)
• Intended material: wood (softwood and hardwood)

How to use

Select a pilot hole appropriate to the wood species and screw diameter to prevent splitting and ensure accurate alignment. Use a Torx bit matched to the TX drive and apply steady torque to drive the screw until the head sits flush or slightly below the wood surface depending on the desired finish. For load-bearing or critical joints, consider pre-drilling and testing a sample connection to verify holding performance.

Usage recommendations

Use corrosion-resistant screws or suitable coatings when installing in humid environments or where exposure to moisture is expected. When working with hardwoods, increase pilot hole size slightly to reduce insertion torque. For visible finishes, countersink and, if required, fill the recess with appropriate wood filler before sanding and finishing.