3a thread class right-hand 0.401" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unjf thread series
2a thread class right-hand 0.940" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 1.819" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 1.151" thread length flat countersunk head style 40 thread quantity per inch navy special project passivate screw surface treated unjc thread series
2a thread class right-hand 0.376" thread length oval countersunk head style 32 thread quantity per inch chromium or nickel screw surface treated unc thread series