2a thread class right-hand 0.033" thread length flat countersunk head style 80 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.113" thread length flat countersunk head style 64 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.563" thread length pan head style 32 thread quantity per inch navy special project oxide screw surface treated unc thread series
3a thread class right-hand 1.376" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unjc thread series