3a thread class right-hand 0.338" thread length flat countersunk head style 0.302" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.298" thread length dished hexagon head style 0.615" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.410" thread length dished hexagon head style 0.678" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 1.176" thread length double hexagon extended washer head style 14 thread quantity per inch flight safety critical aircraft part unjf thread series