Abstract: A multi-pole electric plug connector including a metallic housing. To ensure protective grounding of the housing, a bracket-shaped electrically conducting connector, which is resilient in the axial direction and laterally extends around a contact holder in the housing, and which is axially elastically pushed down by the housing so that contact is made with the housing, and through which a grounding contact extends so as to connect the housing to the grounding contact in an electrically conducting manner.

Abstract: The invention relates to an electrical circular plug-in connector having a plug part and a counter-plug part, which can be releasably locked together by means of a push-pull locking mechanism via at least one locking element that extends axially and can be deflected radially, which element is provided with an inwardly protruding detent, to which an outwardly open latching trap is assigned on the counter-plug part. The locking element is integrally molded on a retaining ring, which is immovably mounted on the plug part between the unlocking sleeve and a front hollow cylindrical plug region of the plug part, and which pulls the plug part and the counter-plug part together in a play-free manner by means of a spring force component acting inwardly in a radial direction.