3a thread class right-hand 0.840" thread length hexagon head style 1.500" grip length 18 thread quantity per inch navy special project cadmium surface treated unjf thread series
3a thread class right-hand 0.497" thread length double hexagon head style 1.997" grip length 24 thread quantity per inch passivate surface treated unjf thread series
2a thread class right-hand 0.239" thread length pan no. 2 head style 56 thread quantity per inch cadmium screw surface treated self-locking unc thread series
3a thread class right-hand 0.323" thread length hexagon head style 3.625" grip length 32 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 1.000" thread length knurled no. 5 head style 40 thread quantity per inch navy special project passivate fastener surface treated unc thread series
Used on aircraft,b-2 bomber (atb). 3a thread class right-hand 0.403" thread length flat countersunk head style 0.365" grip length 28 thread quantity per inch unjf thread series