Abstract: A connector unit 1 comprises a latching shell 3 having three peripheral resilient tongues 4 at substantially 120° from one another each bearing an outwardly projecting latch 5. A catching sleeve 28 also arranged in the connector unit 1 has three peripheral arms 30 at substantially 120° from one another each provided with an inner latch catching groove 31. The peripheral arms 30 of the catching sleeve 28 are located angularly between the resilient tongues 4 of the latching shell 3, whereby the latches 5 are circumferentially alternating with the latch catching grooves 31.