Used on F-15S. 3a thread class right-hand 2.438" thread length crowned hexagon head style 0.031" grip length 24 thread quantity per inch bolt, machine cadmium surface treated unjf thread series
3a thread class right-hand 1.221" thread length hexagon head style 0.070" hole diameter 0.030" grip length 24 thread quantity per inch navy special project passivate surface treated unjf thread series