2a thread class right-hand 0.125" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.295" thread length hexagon head style 0.046" hole diameter 28 thread quantity per inch passivate screw surface treated unjf thread series
3a thread class right-hand 0.804" thread length flat countersunk head style 28 thread quantity per inch navy special project cadmium screw surface treated unichrome dip bulletin 65-b-cd unjf thread series