3a thread class right-hand 0.490" thread length double hexagon extended washer head style 0.047" hole diameter 36 thread quantity per inch unjf thread series
3a thread class right-hand 0.969" thread length crowned hexagon head style 0.031" grip length 32 thread quantity per inch slot drive on thd end cadmium surface treated unf thread series
3a thread class right-hand 0.396" thread length hexagon head style 1.631" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.837" thread length headless (setscrew) head style 12 thread quantity per inch navy special project cadmium surface treated unf thread series