3a thread class right-hand 0.902" thread length dished hexagon head style 0.615" grip length 18 thread quantity per inch navy special project cadmium or chromate surface treated unjf thread series
3a thread class right-hand 0.640" thread length hexagon head style 2.922" grip length 24 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.625" thread length hexagon head style 20 thread quantity per inch material-astm, A354, grbd w ith zinc coating per astm-B633 unc thread series
Used on c-17a aircraft. 3a thread class right-hand straight pan head style 1.433" grip length 20 thread quantity per inch pin-rivet, threaded-protruding head aluminum surface treated unjf thread series
3a thread class right-hand 0.532" thread length flat countersunk head style 1.240" grip length 24 thread quantity per inch dry film lube-threads only passivate surface treated unjf thread series