Used on w/s: aircraft, hornet f/a-18; submarine (ssn) fire control sys; strategic weapon systems (poseidon and trident); aircraft, thunderbolt ii, a-10; ship, ohio class ssn (trident), submarine armament and fire control systems; support equipment, b-1 aircraft; helicopter, utility/search and recovery uh-1n; helicopter, cobra/attack, ah-1j. 2a thread class right-hand 1.376" thread length pan head style 32 thread quantity per inch oxide screw surface treated unf thread series
3a thread class right-hand 0.470" thread length hexagon head style 0.072" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.500" thread length flat countersunk undercut head style 32 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.188" thread length hexagon head style 56 thread quantity per inch navy special project passivate screw surface treated unc thread series
3a thread class right-hand 0.438" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.438" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.406" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unf thread series
