3a 2nd end thread class 0.250 in. outside dia. tube size boss end; machined groove in flared end to accommodate seal ring per KC103 passivate surface treated unf 1st end thread series
3a 1st end thread class 12 2nd end thread quantity per inch width across body hex flats 1.375 in; male tube end leg length 0.556 in; machined groove in flared ends to accommodate seal ring per kc 103 passivate surface treated un 2nd end thread series
