The undercut anchor with an internal thread for M8 threaded screws in natural stone façade panels.
Concealed flush or stand-off installation solution with internal thread for natural stone façade panels. This technology can be used for both flush mounting of calibrated panels or reveal panels and to adjust tolerances in panel thicknesses by using the stand-off installation technology. Due to the integrated internal thread, there is no protruding external thread, allowing the panels to be prefabricated and transported in a space-saving manner. This improves the economic efficiency and flexibility of the system.
The adapted shape of the undercut anchor ensures a positive-locking attachment free from expansion pressure in a conical undercut drill hole.
The fixing of the undercut anchor is not visible on the exposed side, creating a visually attractive and consistent façade surface.
The anchor allows for higher pull-out loads, compared to commonly available systems.
The flush-mounted anchor allows for easy, economical construction of reveals.
Depending on the application, the user can choose between flush installation with an absolute anchoring depth, for instance for reveal panels, and stand-off installation technology with a constant remaining wall thickness that serves as a reference dimension to compensate panel thickness tolerances.
There is no protruding external thread, allowing a space-saving transportation of pre-fabricated façade panels.
Available Product Variants
Application and Permission
Natural stone (>20mm)
* You can find detailed information on building materials in the registration document.
For Details see corresponding Documents
Wet diamond drilling - first cylindrical, depending on the application either to the absolute anchoring depth or to a constant reference dimension for the remaining wall thickness (RWT), then conical to create an undercut drill hole.
When the undercut anchor is installed, an optimal positive-locking connection is created between the expanding part and the drill hole.
The anchor can either be installed flush to the absolute anchoring depth or can be installed in the conical undercut drill hole using stand-off installation.
The ability to compensate panel thickness tolerances helps create a flat façade surface.