3a thread class right-hand 0.570" thread length hexagon head style 40 thread quantity per inch navy special project oxide surface treated unc thread series
3a thread class right-hand 0.437" thread length flat chamfer head style 20 thread quantity per inch soft material inserted in threads for looking feature unc thread series
2a thread class right-hand 0.133" thread length flat countersunk head style 32 thread quantity per inch top of head painted olive drab cadmium surface treated unc thread series
2a thread class right-hand 0.129" thread length flat countersunk head style 32 thread quantity per inch top of head painted red cadmium surface treated unc thread series
2a thread class right-hand 0.125" thread length flat countersunk head style 32 thread quantity per inch navy special project top of painted dark blue cadmium surface treated unc thread series
2a thread class right-hand 0.136" thread length flat countersunk head style 32 thread quantity per inch navy special project top of head painted yellow cadmium surface treated unc thread series
3a thread class right-hand 0.371" thread length flat countersunk head style 28 thread quantity per inch cadmium or chromate surface treated unf thread series
