3a thread class right-hand 0.457" thread length hexagon head style 0.044" hole diameter 32 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.576" thread length hexagon head style 28 thread quantity per inch navy special project passivate surface treated unjf thread series
3a thread class right-hand 0.580" thread length double hexagon extended washer head style 24 thread quantity per inch nickel surface treated unjf thread series