Used on chinook helicopter, model ch-47. 3a thread class right-hand 0.686" thread length dished hexagon head style 0.812" grip length 16 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.335" thread length flat chamfer head style 0.044" hole diameter 32 thread quantity per inch passivate surface treated unrf thread series
3a thread class right-hand 0.583" thread length double hexagon head style 1.250" grip length 20 thread quantity per inch navy special project passivate surface treated unjf thread series
3a thread class right-hand 0.583" thread length double hexagon head style 1.250" grip length 20 thread quantity per inch passivate surface treated unjf thread series
Used on f-18 e/f. 3a thread class right-hand flush countersunk head style 0.620" grip length 3a thread quantity per inch pin-rivet, threaded, shear, 100 degree c'sunk head, hex point drive unjf thread series