2a thread class right-hand 0.608" thread length flat countersunk undercut head style 20 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.464" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.238" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.432" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series