2a thread class right-hand 1.691" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.824" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.314" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
2a thread class right-hand 1.148" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unc thread series