The system has a female, tube- or cone-shaped receptacle (11) with an interior receptacle section and an external fixing section. A male, tube- or cone-shaped insertion element (12) is accommodated in the female receptacle. Another external fixing section (14) interacts with the former fixing section for fixing the system. The fixing sections have two radially outward-protruding lobes (13), where radial external edge of the lobes lies on a diameter greater than 7.83 mm and/or axial thickness of the lobes at the base is greater than 1.3 mm.
