Norgren 15020 series iso r nipple adaptors nickel plated brass bevelled threads norgren 150201818 this nipple adaptor is from the norgren 15 series of bsp and hose fittings the adaptor has iso r tapered threads and is manufactured from nickel plated brass suitable for use in compressed air systems norgren 150201818 iso r nipple adaptor r18 to r18 bevelled threads 55mm bore