2a all ends thread class 3.188" overall length 12 all ends thread quantity per inch cadmium body surface treated male coupling half un all ends thread series
2a external thread class right-hand external 1.312" overall length 12 external thread quantity per inch plug, tube fitting flared (note: drilled hole is optional should not be considered as a separating characteristic un external thread series
3b 1st end thread class 24 1st end thread quantity per inch drilled for two lockwire holes 180 deg apart passivate surface treated unjs 1st end thread series