Plug type connector comprising: • a connector head, the connector head having a bush-like base member having a wall and at least one cable connection element which is provided at the end side; and • a sliding bush for receiving the base member, the sliding bush being able to be fitted in an insertion direction (x) axially over the base member; wherein • the base member and the sliding bush can be connected to each other in a non-releasable manner by means of a bush-like catch sleeve which is arranged between the sliding bush and the base member; characterised in that the catch sleeve has, at two mutually opposing regions (213, 214) of the bush wall thereof, whose inner sides are spaced apart from each other by at least a first dimension (c), resilient locking elements which partially protrude both in an outward direction and in an inward direction of the bush-like catch sleeve beyond the bush wall; whereby the locking elements are each formed by means of a resilient tongue which extends in an axial direction of the catch sleeve and which is connected to the catch sleeve at one side and a locking means which is located at the free end of the tongue; whereby the base member has, at least at two mutually opposing regions (123, 124) of the wall thereof whose outer sides are spaced apart from each other by means of at least a second dimension (a), recesses which are formed in such a manner that they receive the locking elements of the catch sleeve in a positive-locking manner; and whereby the sliding bush has, at least at two mutually opposing regions (451, 452) of an inner wall which is spaced apart from each other by means of at least a fourth dimension (d), catch projections whose inwardly directed tips are spaced apart from each other by means of at least a third dimension (b) and which are formed in such a manner that they form a positive-locking connection with respect to the locking means of the catch sleeve. • a connector head, the connector head having a bush-like base member having a wall and at least one cable connection element which is provided at the end side; and • a sliding bush for receiving the base member, the sliding bush being able to be fitted in an insertion direction (x) axially over the base member; wherein • the base member and the sliding bush can be connected to each other in a non-releasable manner by means of a bush-like catch sleeve which is arranged between the sliding bush and the base member; characterised in that the catch sleeve has, at two mutually opposing regions (213, 214) of the bush wall thereof, whose inner sides are spaced apart from each other by at least a first dimension (c), resilient locking elements which partially protrude both in an outward direction and in an inward direction of the bush-like catch sleeve beyond the bush wall; whereby the locking elements are each formed by means of a resilient tongue which extends in an axial direction of the catch sleeve and which is connected to the catch sleeve at one side and a locking means which is located at the free end of the tongue; whereby the base member has, at least at two mutually opposing regions (123, 124) of the wall thereof whose outer sides are spaced apart from each other by means of at least a second dimension (a), recesses which are formed in such a manner that they receive the locking elements of the catch sleeve in a positive-locking manner; and whereby the sliding bush has, at least at two mutually opposing regions (451, 452) of an inner wall which is spaced apart from each other by means of at least a fourth dimension (d), catch projections whose inwardly directed tips are spaced apart from each other by means of at least a third dimension (b) and which are formed in such a manner that they form a positive-locking connection with respect to the locking means of the catch sleeve.