Concrete screw Koelner/Rawlplug M10 x 85 mm with a countersunk head, supplied in a pack of 10 pieces, is designed for direct fastening into concrete and masonry where a flush finish is required. The screw is intended for use in prepared drilled holes and provides a threaded mechanical anchoring without the need for separate anchor sleeves in many common applications. Its length and M10 diameter make it suitable for medium-duty fixings such as mounting brackets, metal profiles and fixtures to solid substrates.
Advantages
The countersunk head allows the fastener to sit flush with the surface for a neat finish and reduces the risk of protrusion. Threaded design provides immediate load transfer into the base material once tightened in a correctly prepared hole. Supplied as a pack of 10, the set is convenient for small projects and repair jobs, ensuring consistent parts and dimensions across multiple fixings. The product is compatible with common drill sizes and installation methods used for concrete screws.
Suitable for
- Mounting metal brackets and profiles to concrete or solid masonry
- Fixing fixtures and fittings where a countersunk finish is required
- Medium-duty structural and non-structural connections in solid substrates
- Repair and renovation tasks requiring multiple identical fasteners
When it may not be suitable
This concrete screw is intended for use in solid concrete and masonry; it is not designed for hollow or perforated blocks unless used with an appropriate sleeve or alternative anchor system. It may not be appropriate where very high load ratings, seismic certifications, or specialized corrosion resistance are required—consult technical data or choose a specified anchor type for critical structural applications.
Key specifications
- Diameter: M10
- Length: 85 mm
- Head type: countersunk
- Pack quantity: 10 pieces
- Suitable base materials: solid concrete and solid masonry
How to use
Drill a hole in the substrate using the recommended drill bit diameter for M10 concrete screws and the appropriate drilling method for the base material. Clean the hole of dust and debris before inserting the screw. Place the fixture or profile over the hole, insert the screw through the fixture and into the drilled hole, then tighten with a compatible wrench or driver until the countersunk head is flush with the surface. Do not overtighten; follow manufacturer torque guidance where available and ensure required embedment depth is achieved for secure anchoring.
What to consider before purchase
- Confirm the substrate is solid concrete or solid masonry suitable for direct screw anchoring
- Check required embedment depth and load requirements for your application
- Ensure the countersunk head profile matches the fixture or cover requirements
- Verify drill bit size and installation tools are available for M10 screws
Usage recommendations
Use appropriate personal protective equipment and suitable drilling technique for concrete. For safety-critical or high-load applications consult structural guidelines or a qualified engineer and consider using certified anchors with published load data.
