Plug connector for receiving and contacting a coaxial cable, comprising the following features: - an outer conductor socket for receiving the coaxial cable, a central axis passing through the outer conductor socket; - an inner conductor receiving element for receiving an inner conductor of the coaxial cable, the inner conductor receiving element being arranged so as to be centred within the outer conductor socket; - the outer conductor socket comprises at least one contact region which is configured to electrically contact an outer conductor of the coaxial cable; - a mechanical fastening is provided, the coaxial cable which is to be received is rigidly connectable to at least one portion of the outer conductor socket via the mechanical fastening; - the plug connector additionally comprises at least one separation element, which is arranged within the outer conductor socket in such a way that electrical contact of the end face of the outer conductor of a coaxial cable, which can be inserted into the outer conductor socket, with the outer conductor socket is impeded or prevented, and in that, in the plugged-in state, the contact region is arranged in the outer conductor socket in such a way that the peripheral wall, which is adjacent to the end face, of the outer conductor is electrically radially contactable; characterised by the following features: - the contact region comprises contact ribs and/or contact ridges; and/or - an end portion of the outer conductor socket, at which the mechanical fastening engages, is at an axial distance from the contact region via which the outer conductor socket is electrically contacted with the outer conductor of the insertable coaxial cable; and the contact region via which the outer conductor socket is electrically contacted with the outer conductor of the insertable coaxial cable is arranged closer to the inner conductor receiving element than the end portion of the outer conductor socket, at which the mechanical fastening engages. - an outer conductor socket for receiving the coaxial cable, a central axis passing through the outer conductor socket; - an inner conductor receiving element for receiving an inner conductor of the coaxial cable, the inner conductor receiving element being arranged so as to be centred within the outer conductor socket; - the outer conductor socket comprises at least one contact region which is configured to electrically contact an outer conductor of the coaxial cable; - a mechanical fastening is provided, the coaxial cable which is to be received is rigidly connectable to at least one portion of the outer conductor socket via the mechanical fastening; - the plug connector additionally comprises at least one separation element, which is arranged within the outer conductor socket in such a way that electrical contact of the end face of the outer conductor of a coaxial cable, which can be inserted into the outer conductor socket, with the outer conductor socket is impeded or prevented, and in that, in the plugged-in state, the contact region is arranged in the outer conductor socket in such a way that the peripheral wall, which is adjacent to the end face, of the outer conductor is electrically radially contactable; - the contact region comprises contact ribs and/or contact ridges; and/or - an end portion of the outer conductor socket, at which the mechanical fastening engages, is at an axial distance from the contact region via which the outer conductor socket is electrically contacted with the outer conductor of the insertable coaxial cable; and