This document provides the design for an LNG (un)loading connector between LNG road tanker and LNG fuelling stations. This document can be also used for LNG rail tenders. This document includes requirements for (at least): functional description of the LNG Unloading Receptacle and LNG Unloading Nozzle; technical layout description of the LNG Unloading Receptacle. The technical layout description of the LNG Unloading Nozzle is not part of this document. The basic functional requirement of the LNG unloading connector are as follows: to prevent leakage of methane during operation and in particular during disconnecting; easy handling, no spillage and purging with nitrogen during disconnecting. The loading connector between the LNG road tanker and the LNG terminal is not covered by this document.