UNI earthing terminal according to DIN EN 62561-1, for integrating the mounting systems, e.g. of PV systems, into the functional equipotential bonding/functional earthing (conductor color black if necessary) and lightning protection equipotential bonding according to DIN EN 62305-3 (VDE 0185-305-3). The contact plate (intermediate element) made of stainless steel allows different conductor materials (Cu, Al, St/tZn and stainless steel) to be connected to the usual mounting systems, e.g. made of aluminum, without contact corrosion occurring. Version with M10 hammer head screw, self-locking nut and double cleat, e.g. for through-wiring of the profiles.