Used on grumman a-10 acft. 3a all ends thread class 12 all ends thread quantity per inch passivate surface treated flared w/ center wrenching facility unj all ends thread series
3a external thread class right-hand external 0.734" overall length passivate surface treated plug, tube fitting flared (note: drilled hole is optional should not be considered as a separating characteristic unf external thread series
2a all ends thread class 2.484" overall length bulkhead threads on fluid end anodize body surface treated male coupling half unf all ends thread series
Used on c-130 series aircraft; nimitz class cvn. 1.968" overall length weapon system essential; needed for personnel safety passivate body surface treated male coupling half npt all ends thread series