2a thread class right-hand 0.542" thread length dished hexagon head style 24 thread quantity per inch cadmium or zinc surface treated unf thread series
2a thread class right-hand 0.625" thread length hexagon head style 0.090" hole diameter 28 thread quantity per inch phosphate surface treated unf thread series
2a thread class right-hand 2.500" thread length hexagon head style 9 thread quantity per inch navy special project passivate surface treated unc thread series