Used on special acft and eng tools,support equip and parts. 2b thread class right-hand 0.249" thread length 7 thread quantity per inch navy special project unc thread series
3a thread class right-hand 0.403" thread length flat countersunk head style 0.240" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 2.401" thread length dished hexagon head style 1.740" grip length 16 thread quantity per inch oversize shank for repair work only cadmium surface treated unjf thread series
3a thread class right-hand 0.710" thread length dished hexagon head style 2.240" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.553" thread length dished hexagon head style 0.990" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.444" thread length dished hexagon head style 1.803" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.444" thread length dished hexagon head style 1.678" grip length 24 thread quantity per inch cadmium surface treated unjf thread series