The pressure equalisation screw connections from RST combine the features of a pressure equalisation element with those of a cable gland. That means they prevent the formation of condensation and at the same time ensure that the cable connection to the housing is dust- and watertight - IP66/67. This is guaranteed by the air vent filter made of PTFE in the neck of the screw connection. An extra bore hole and installation of a pressure equalisation element can be dispensed with. The pressure equalisation screw connection is available in polyamide or nickel-plated brass, in the sizes M12, M16 and M20.