2a thread class right-hand 0.066" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated pozidriv unc thread series
2a thread class right-hand 1.812" thread length pan head style 32 thread quantity per inch screw, machine, aircraft oxide screw surface treated unc thread series
3a thread class right-hand 0.968" thread length flat countersunk head style 40 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.625" thread length pan no. 2 head style 0.046" hole diameter 24 thread quantity per inch passivate screw surface treated unjc thread series