2a thread class right-hand 0.177" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.438" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.183" thread length hexagon head style 0.059" hole diameter 20 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.543" thread length hexagon head style 0.865" grip length 24 thread quantity per inch passivate surface treated unjf thread series
Used on tf-33 engine;engine,aircraft,tf-33-p-7;aircraft,stratofortress b-52;aircraft,stratolifter c-135;aircraft,galaxy c-5;aircraft,starlifter c-141;e-3a awacs. 3a thread class right-hand 0.320" thread length dished hexagon head style 0.490" grip length 32 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.340" thread length hexagon head style 20 thread quantity per inch silver threads surface treated concentric hole unthreaded unf thread series
