3b thread class right-hand 18 thread quantity per inch fleet ballistic missile quality, as identified by quality control number poso 912799 passivate surface treated
Used on mhu-7/m. elbow, tube; steel; thd external tube, 1st ent, flared, 0.750, unf-3a rh thd; identical 2nd end relationship with 1st end, 1.841 in. nom 1st end, 1.344 in. nom 2nd end let lg, 90 deg flow angle