3a external thread class right-hand external 1.281" overall length 12 external thread quantity per inch machined groove in flared end to accommodate seal ring per KC103; tube od 1.000 passivate surface treated plug, tube fitting flared (note: drilled hole is optional should not be considered as a separating characteristic uns external thread series
Used on 04f aircraft, stratofortress b-52. 3a 1st end thread class 12 1st end thread quantity per inch cadmium inside surface treated un 1st end thread series
Used on pza machine gun, grenade, 40mm mod iii(hild), mk19. 2b thread class right-hand 24 thread quantity per inch medium straight or diamond knurl on od phosphate surface treated
