Electrical Plug-In Connection

An electrical plug-in connection (1) comprising:

• an electrical plug-in connector (2) that defines a longitudinal axis L1 the electrical plug-in connector (2) having
• an external conductor contact element (5) that has a plug-side end region that defines an inner surface (9), and the inner surface, (9) is rotationally symmetrical with respect to the longitudinal axis L1 of the electrical plug-in connector (2), and the inner surface (9) has an internal diameter which tapers in a direction which is opposed to a plug-in direction S1 of the electrical plug-in connector (2);
• and
• a corresponding electrical mating plug-in connector (3) that defines a longitudinal axis L2, the corresponding electrical mating plug-in connector (3) having
• a mating external conductor contact element (8) that has plug-side end region that defines an outer surface (12), and the outer surface (12) is rotationally symmetrical with respect to the longitudinal axis 12 of the corresponding electrical mating plug-in connector (3) and the outer surface (12) has an external diameter which tapers in a plug-in direction S2 of the of the corresponding electrical mating plug-in connector (3);
• and wherein
• the inner surface (9) of the electrical plug-in connector (2), and the outer surface (12) of the corresponding electrical mating plug-in connector (3), contact one another solely on a circular line (15).