2a thread class right-hand 2.250" thread length hexagon head style 0.070" hole diameter 12 thread quantity per inch cadmium surface treated un thread series
3a thread class right-hand 0.160" thread length hexagon head style 0.030" grip length 32 thread quantity per inch navy special project cadmium surface treated unf thread series
Used on spec item. 3a thread class right-hand 0.630" thread length hexagon head style 0.047" hole diameter 0.810" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.616" thread length double hexagon w/hole head style 0.252" grip length 32 thread quantity per inch oxide film surface treated unjf thread series