2a thread class right-hand modified pan head style 32 thread quantity per inch passivate screw surface treated drilled hole 0.062 in. nom dia, 0.169 in. from point of screw unc thread series
2a thread class right-hand 0.025" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.183" thread length watertight head style 56 thread quantity per inch navy special project passivate screw surface treated unf thread series
3a thread class right-hand 1.672" thread length hexagon head style 32 thread quantity per inch navy special project passivate screw surface treated unjc thread series