3a thread class right-hand 0.569" thread length dished hexagon head style 0.615" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.631" thread length flat countersunk head style 0.302" grip length 24 thread quantity per inch made from nas 336CA7 nsn 5305-00-971-7467 cadmium surface treated unf thread series
Used on f-22 raptor. 3a thread class right-hand 0.469" thread length hexagon head style 32 thread quantity per inch screw captive, hex head passivate surface treated unjf thread series