Self-tapping screw by Koelner/Rawlplug for fixing gypsum board to metal structures. The 4.2 x 70 mm length is designed to reach through plasterboard and secure into metal profiles or sheet metal, providing reliable anchoring for partitions, suspended ceilings and drywall constructions. Supplied in a 0.25 ts pack, this screw type is intended for applications where longer fasteners are needed to traverse board thickness and engage thin metal framing.
Advantages
The screw features a self-tapping thread that cuts into thin metal, eliminating the need for pre-drilling in many cases and speeding up installation. Its length and diameter combination gives sufficient pull-out resistance for standard gypsum board assemblies on metal studs. The head and drive design ensure consistent seating of the board and compatibility with common screwdrivers or screw guns used in drywall work.
Suitable for
- Fixing gypsum plasterboard to metal studs and profiles
- Installing suspended ceilings where longer screws are required
- Building non-loadbearing partitions using sheet metal framing
- Renovation projects needing replacement fasteners for metal-to-board connections
When it may not be suitable
This screw is intended for fixing board to thin metal profiles and is not designed for heavy structural loads or fastening into solid timber, concrete, or thick steel sections. For applications requiring high shear strength or certified structural connections, use fasteners specified for those conditions.
Key specifications
- Type: self-tapping drywall screw for metal
- Diameter: 4.2 mm
- Length: 70 mm
- Suitable substrate: thin metal profiles and sheet metal
- Pack size: 0.25 ts
How to use
Position the gypsum board against the metal profile and drive the screw through the board until the head is flush with or slightly recessed below the board surface without damaging the paper face. Use an appropriate torque setting on a cordless or pneumatic screw gun to avoid over‑driving. When securing into harder or thicker metal, pilot holes may be required; otherwise the self-tapping thread will form its own mating thread in typical drywall metal studs.
What to consider before purchase
- Verify that 70 mm length is appropriate for the combined thickness of board plus metal profile and any insulating layers
- Confirm compatibility of the screw head and drive with available tools
- Assess if self-tapping screws are acceptable for local building requirements and load conditions
Usage recommendations
Use consistent spacing and appropriate screw density per gypsum board manufacturer guidelines to ensure stable, even panels; avoid over-torquing to prevent crushing the board face.
