2a thread class right-hand 0.100" thread length flat countersunk undercut head style 80 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.389" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.344" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.469" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series