Norgren 15043 series elbow connectors iso g to iso r nickel plated brass norgren 150430048 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 150430048 iso giso r elbow connector g12 int thread r12 ext thread