2b 2nd end thread class 12 1st end thread quantity per inch machined groove in flared ends to accommodate seal rings per KC103 passivate outside surface treated un 3rd end thread series
3a external thread class right-hand external 1.109" overall length machined groove in flared end to accommodate seal ring per KC103 passivate surface treated plug, tube fitting flared (note: drilled hole is optional should not be considered as a separating characteristic unf external thread series
3a 2nd end thread class 12 1st end thread quantity per inch machined groove in flared ends to accommodate seal rings per KC103 passivate outside surface treated un 1st end thread series