Used on mrap-cougar. 18 1st end thread quantity per inch rigid male pipe fitting hose connection type: permanent; inner diameter: 0.313 inch dichromate surface treated threaded external rigid, threaded internal swivel nptf 1st end thread series
Used on mount,barbette assembly. 2b 2nd end thread class 18 2nd end thread quantity per inch drain fitting, barbette passivate surface treated un 2nd end thread series
Used on H-46. 16 1st end bulkhead thread quantity per inch adapter bulkhead permaswage to-male flarless flared w/ bulkhead thread unjf 1st end bulkhead thread series