2a thread class right-hand 0.409" thread length flat countersunk head style 80 thread quantity per inch passivate screw surface treated unf thread series
Used on e3 awacs. 3a thread class right-hand 1.750" thread length hexagon head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
2a thread class right-hand 0.154" thread length binding head style 32 thread quantity per inch navy special project oxide screw surface treated unc thread series
Used on f-16 aircraft;aircraft, viking s-3b. 3a thread class right-hand 0.336" thread length flat chamfer head style 28 thread quantity per inch cadmium screw surface treated unjf thread series
3a thread class right-hand 0.538" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series