Norgren 15043 series elbow connectors iso g to iso r nickel plated brass norgren 150430018 these elbow connectors have an external tapered iso r thread and an internal iso g thread the connectors are manufactured from nickel plated brass and are from the norgren 15 series of bsp and hose fittings suitable for use in compressed air systems norgren 150430018 iso giso r elbow connector g18 int thread r18 ext thread