Koelner/Rawlplug gravity-type expansion anchor M5 x 90 mm, pack of 2 is a mechanical anchoring solution designed for use in solid base materials such as concrete and masonry. The anchor expands when a bolt or threaded rod is tightened, creating radial pressure against the wall of the drilled hole to secure fixtures, brackets and light structural elements. Supplied as two pieces, this M5 anchor is sized for medium-duty connections where a compact, reliable fastener is required.
Advantages
The gravity-type design ensures consistent expansion and holding force in solid substrates while remaining simple to install. The M5 diameter and 90 mm length provide sufficient embedment depth for common installations, and the pack of two allows placement of paired fixings or a spare fastener for immediate use. The anchor offers a mechanical, non-chemical solution that is suitable for a range of indoor and outdoor applications when used in appropriate base materials.
Suitable for (tasks / use cases)
- Mounting light brackets, shelves and fixtures on concrete or solid masonry
- Securing small structural connectors and metal fittings
- Fastening threaded rods or bolts for medium-duty support
- Repair work and retrofit installations that require mechanical anchors
When it may not be suitable
This anchor is intended for solid base materials; it is not designed for hollow blocks, lightweight aerated concrete without proper sleeve support, or weak crumbly substrates. It is also not intended for heavy structural loads or critical safety applications where higher-grade or specifically tested anchors (chemical anchors, heavy-duty expansion anchors) are required.
Key specifications
- Anchor type: gravity-type expansion anchor
- Thread size compatibility: M5 bolts or threaded rods
- Overall length: 90 mm
- Suitable base materials: solid concrete, solid masonry
- Pack quantity: 2 pieces
How to use
Drill a hole of the correct diameter and depth for the anchor into the solid base material, then clean the hole of dust and debris. Insert the expansion anchor into the hole until it is flush or at the required embedment depth. Insert the M5 bolt or threaded rod and tighten to the specified torque to cause the anchor to expand and lock against the hole wall. Follow recommended drilling diameters and tightening torques for the base material and bolt grade to achieve the intended holding performance.
What to consider before purchase
- Confirm the base material is solid concrete or solid masonry and suitable for mechanical expansion anchors
- Verify that M5 thread size and 90 mm length meet the required embedment depth and fixture spacing
- Consider load requirements and safety factors to ensure the anchor capacity is adequate
- Ensure compatible bolt or threaded rod grade and correct installation tools are available
Usage recommendations
Use a properly sized drill bit and clear the hole of dust before insertion. Tighten bolts gradually and avoid over-torquing; consult manufacturer guidelines or structural specifications for recommended torque values and spacing between anchors to achieve reliable anchoring.
