2a thread class right-hand 0.125" thread length fillister head style 72 thread quantity per inch passivate screw surface treated alternate material per ams 5640 type 303 unf thread series
2a thread class right-hand 0.120" thread length binding head style 56 thread quantity per inch navy special project cadmium screw surface treated unc thread series
3a thread class right-hand 0.251" thread length pan no. 2 head style 32 thread quantity per inch navy special project passivate screw surface treated unjc thread series
3a thread class right-hand 0.314" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series