3a thread class right-hand 0.056" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.470" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 4.432" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series