Koelner/Rawlplug R-LX concrete screw M6 7.5x60 mm with a hexagonal flange head and electro-galvanized finish is a mechanical fastener designed for direct fixing into concrete and masonry. The screw is made for applications where a reliable threaded anchor is needed without using chemical or sleeve anchors. It requires a correctly sized pre-drilled hole and installation to the specified torque to develop secure mechanical engagement in solid substrates.
Advantages
The hexagonal flange head provides a large bearing surface that helps distribute load and reduces the risk of pull-through in installed fixtures. Electro-galvanized surface treatment offers corrosion resistance for indoor and some sheltered outdoor environments. The R-LX geometry is optimized for cutting into concrete and masonry, permitting straightforward installation with common drills and torque tools while delivering repeatable holding performance.
Suitable for
- Fixing brackets, profiles and metal or wooden fixtures to concrete or solid masonry
- Mounting light to medium-duty hardware such as cable trays, rails and conduit supports
- Applications requiring a threaded attachment point for bolted assemblies
When it may not be suitable
This concrete screw is intended for solid concrete and dense masonry; it is not suitable for hollow block, lightweight aerated concrete, or poorly compacted substrates where the thread cannot engage solid material. For structural overhead loads, dynamic loading, or highly corrosive environments, alternative anchors or stainless steel fasteners should be considered.
Key specifications
- Nominal thread size: M6
- Screw diameter: 7.5 mm
- Length: 60 mm
- Head type: hex flange head for wrench or socket drive
- Finish: electro-galvanized coating for basic corrosion protection
- Application: direct fixing into solid concrete and masonry with pre-drilled hole
How to use
Drill a hole to the recommended diameter and depth for a 7.5 mm screw into clean, solid concrete or masonry. Remove dust from the drilled hole, position the fixture, and insert the concrete screw through the fixture into the hole. Tighten with a compatible wrench or socket to the manufacturer’s recommended torque value to achieve full mechanical engagement; avoid over-torquing which can damage the substrate or fastener. If precise torque values are required for safety-critical installations, consult anchor load tables and use a calibrated torque tool.
What to consider before purchase
- Confirm substrate is solid concrete or dense masonry suitable for thread engagement
- Verify required screw length accounts for fixture thickness plus embedment depth
- Choose appropriate corrosion resistance for the installation environment
Usage recommendations
Use appropriate drill bit size and clean holes of dust before installation; apply specified torque and check pull-out or shear loads against published anchor performance data when used in safety-relevant applications.
