3a thread class right-hand 0.812" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.438" thread length flat chamfer head style 20 thread quantity per inch zinc or chromate screw surface treated unc thread series
2a thread class right-hand 0.542" thread length oval countersunk head style 24 thread quantity per inch navy special project nickel screw surface treated unc thread series
2a thread class right-hand 0.133" thread length flat countersunk head style 48 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.625" thread length flat countersunk undercut head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.375" thread length flat chamfer head style 32 thread quantity per inch cadmium or zinc screw surface treated unc thread series