3a thread class right-hand 0.820" thread length hexagon head style 0.062" hole diameter 24 thread quantity per inch silver surface treated unf thread series
3a thread class right-hand 0.938" thread length hexagon head style 4.047" grip length 28 thread quantity per inch with six drilled holes in head cadmium surface treated unf thread series
3a thread class right-hand 0.438" thread length flat chamfer head style 20 thread quantity per inch zinc or chromate screw surface treated unc thread series
3a thread class right-hand 0.375" thread length fillister head style 28 thread quantity per inch navy special project thd end chamfered 0.031 by 45.0 deg passivate surface treated unf thread series
