3a thread class right-hand 0.630" thread length fillister head style 0.028" hole diameter 64 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.409" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.515" thread length flat countersunk head style 18 thread quantity per inch phosphate screw surface treated unf thread series
2a thread class right-hand 0.188" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.089" thread length flat countersunk undercut head style 64 thread quantity per inch passivate screw surface treated unf thread series
Used on aircraft,freedom fighter f-5;aircraft;helicopter,iroquois uh-1;aircr. 2a thread class left-hand 0.283" thread length 0.052" hole diameter 28 thread quantity per inch unf thread series
3a thread class right-hand 0.251" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series
3a thread class right-hand 0.366" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unjf thread series
2a thread class right-hand 0.579" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated extension at threaded end 0.145 in. dia, 0.250 in. lg w/internal thd 0.112-40 unc-2b 0.250 in. lg unc thread series
2a thread class right-hand 0.427" thread length fillister head style 0.070" hole diameter 48 thread quantity per inch navy special project unf thread series
