2a thread class right-hand 0.380" thread length hexagon head style 40 thread quantity per inch navy special project passivate screw surface treated unc thread series
2a thread class right-hand 1.129" thread length flat countersunk head style 24 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 1.750" thread length flat countersunk head style 36 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.062" thread length flat countersunk head style 40 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.157" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unjc thread series
3a thread class right-hand 0.372" thread length flat countersunk head style 80 thread quantity per inch navy special project passivate screw surface treated unf thread series