2a thread class right-hand 1.500" thread length hexagon head style 11 thread quantity per inch hole in end of fastener countersunk to 0.250 in. dia. cadmium surface treated unc thread series
3a thread class right-hand 0.728" thread length hexagon head style 7.172" grip length 20 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.444" thread length dished hexagon head style 0.802" grip length 24 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.526" thread length dished hexagon head style 0.115" grip length 24 thread quantity per inch cadmium surface treated unjf thread series