SCREW CONNECTOR FOR MEDICAL HOSE SYSTEMS AND MEDICAL HOSE SYSTEMS HAVING A SCREW CONNECTOR

The present invention makes available a screw connector for medical hose systems designed for catch engagement in a half-open sterilization position. The screw connector comprises a first connecting element having a first lumen and an outside thread and a second connecting element having a second lumen and an elastically deformable union nut having an inside thread. The inside thread and the outside thread are configured to be screwed together, such that the outside thread has at least one first formation and the inside thread has at least one second formation. The inside thread and the outside thread are configured for mutual screw connection with elastic deformation of the union nut by means of the first formation in at least one predetermined first angle-of-rotation range without the first formation engaging in the second formation. The inside thread and the outside thread as well as the first formation and the second formation are each configured for catch engagement of the first formation in the second formation when the inside thread and the outside thread are screwed together in a predetermined second angle-of-rotation range in which the half-open sterilization position is set.