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 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 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 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 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 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 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 . <EOS>