3a 2nd end thread class 12 1st end thread quantity per inch machined groove in flared ends to accommodate seal ring per kc 103 passivate surface treated un 1st end thread series
3a 1st end thread class 12 1st end thread quantity per inch machined groove in flared ends to accommodate seal ring per KC103 passivate surface treated anpt 2nd end thread series
3a 2nd end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate surface treated un 1st end thread series