2a thread class right-hand 0.506" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.756" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.463" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series