2a thread class right-hand 0.625" thread length hexagon head style 0.090" hole diameter 28 thread quantity per inch phosphate surface treated unf thread series
Used on an/alq-119/184common. 3a thread class right-hand 0.349" thread length flat countersunk head style 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.540" thread length hexagon head style 18 thread quantity per inch nickel surface treated concentric hole unthreaded unjf thread series