Plug connector

The invention relates to a plug connector, in particular a plug connector having a high level of electrical insulation. The plug connector was to be developed such that a mechanically stable and tight plug connection can be achieved, which additionally allows a quick and easy connection and disconnection even in harsh industrial environmental conditions. For that purpose the plug connector comprises a male plug part (1) and a female coupling part (2), wherein the male plug part (1) has a catch mechanism (3) on the circumferential surface and a locking groove (4) is provided on the female coupling part (2) to produce a bayonet-type plug connection. Here, an annular seal (5) is provided either on the circumference of the male plug part (1) ahead of the catch mechanism (3) or on the inner circumference of the female coupling part (2) shifted back with respect to the catch mechanism (3). When the plug connection is closed, the annular seal rests, exerting a sealing force, between the circumference of the male plug part (1) and the inner circumference of the female coupling part (2).