2a thread class right-hand 0.669" thread length hexagon head style 0.103" hole diameter 14 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.073" thread length flat chamfer head style 56 thread quantity per inch navy special project passivate surface treated unjc thread series
3a thread class right-hand 0.352" thread length hexagon head style 0.070" hole diameter 28 thread quantity per inch cadmium surface treated unjf thread series