2a thread class right-hand 1.625" thread length hexagon extended washer head style 16 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 1.139" thread length flat chamfer head style 18 thread quantity per inch the head may or may not be knurled at the manufacturer's option cadmium surface treated unf thread series
2a thread class right-hand 1.500" thread length flat chamfer head style 0.061" hole diameter 20 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 1.673" thread length hexagon head style 1.240" grip length 24 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.457" thread length dished hexagon head style 32 thread quantity per inch navy special project undeundercut under counterbore dia. 0.098 min. counterbore threaded unjc thread series
3a thread class right-hand 3.625" thread length double hexagon extended washer head style 9 thread quantity per inch cadmium fastener surface treated unc thread series