DURAN® safety ground joints for increased safety requirements.– Threaded sleeve prevents unintentional loosening of the ground joint – Firmly seated ground joints can be loosened more easily here. The danger of glass breakage and associated risks is thus minimized. – Use in equipment for handling hazardous substances or working with pressure differences.g in the high vacuum range – Tight closure due to standard ground joint – Glass articles for further processing DURAN® safety ground joints for increased safety requirements.– Threaded sleeve prevents unintentional loosening of the ground joint – Firmly seated ground joints can be loosened more easily here. The danger of glass breakage and associated risks is thus minimized. – Use in equipment for handling hazardous substances or working with pressure differences.g in the high vacuum range – Tight closure due to standard ground joint – Glass articles for further processing