3a thread class right-hand 0.470" thread length hexagon head style 0.046" hole diameter 28 thread quantity per inch m/f AN4CH11a; dry film lubricant i/a/w mil-L46010, except do not sandblast passivate surface treated unf thread series
2a thread class right-hand 2.750" thread length hexagon head style 7 thread quantity per inch navy special project zinc surface treated unrc thread series
Used on F-100. 3a thread class right-hand 0.335" thread length hexagon head style 36 thread quantity per inch bolt item is fracture/durability critical; is an aviation critical safety item/flight safety critical part unjf thread series
Used on spec item. 3a thread class right-hand 0.641" thread length hexagon extended washer head style 7.703" grip length 24 thread quantity per inch drilled head unf thread series
