3a thread class right-hand 0.423" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unjf thread series
2a thread class right-hand 0.276" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.245" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series