Plug connector for fluid conduits

A plug connector for fluid conduits, comprising

• a housing part with a plug socket for the fluid-tight insertion of a tubular plug-in part,
• a holding element for locking the inserted plug-in part and a fluid seal for sealing the inserted plug-in part being arranged in the plug socket,
• the housing part being in two parts comprising a base part and an insert part which is connected to the base part by a first snap-action positive fit connection directly between the insert part and the base part,
• the base part comprising a receiving part for the holding element, the fluid seal, and the insert part,
• a joining part for the joining connection of the housing part to a fluid conduit,
• a dirt seal located on a mouth side of the plug socket,
• and a plug-in part received within the plug socket in a pre-locking position wherein the plug-in part is retained by engagement with the holding element and wherein a leakage path is defined within the plug connector between depressions on an outer surface of the plug-in part and inner surfaces of the insert part, the fluid seal, and the dirt seal;
• the depressions being arranged in two groups on the outer circumference of the plug-in part including a first group in the region of the fluid seal and further in a second group in the region of the dirt seal, wherein an axial center distance (A) between the depressions corresponds at least approximately to an axial distance (B) between the fluid seal and the dirt seal;
• the plug-in part being received within the plug socket in a sealed position after insertion of the plug-in part beyond the pre-locking position wherein the leakage path is sealed off by the fluid seal bearing on a fluid-sealing section around the outer circumference of the plug-in part located axially between the two groups of depressions;
• and whereby means for securing against relative rotation are provided between said receiving part and said joining part in such a manner that the receiving part and the joining part can be fitted axially but are secured against rotation relative to one another.