3a thread class right-hand 0.578" thread length hexagon head style 1.302" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
Used on spec item. 2a thread class right-hand 0.219" thread length flat chamfer head style 32 thread quantity per inch passivate surface treated unf thread series
Used on agm-88 highspeed anti-radiation missile (harm). 3a thread class right-hand 0.510" thread length flat chamfer head style 32 thread quantity per inch thru hole 0.076 in. min 0.077in. max dia unc thread series