The invention relates to an electric plug-in connector having a contact carrier (1) and a threaded part (2), which can be screwed together with a counter-threaded part (4) of a counter plug connector in a configuration as a cap nut or cap screw, wherein an elastic sealing element (5) is pressed together, wherein an actuation sleeve (6) is associated with the threaded part (2), to which a torque can be applied, and which is pivot-coupled to the threaded part (2). In order to avoid damage to the sealing element, the invention provides an elastic active element (7, 30, 34) that deforms during the pressing together of the sealing element (5) such that the pivot coupling is released between the actuation sleeve (6) and the threaded part (2) upon exceeding a threshold deformation