3a thread class right-hand 0.406" thread length hexagon head style 2.500" grip length 32 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.531" thread length hexagon head style 0.070" hole diameter 2.688" grip length 24 thread quantity per inch cadmium or chromate surface treated unf thread series
3a thread class right-hand 0.610" thread length hexagon head style 3.672" grip length 24 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.750" thread length hexagon head style 0.070" hole diameter 0.047" grip length 20 thread quantity per inch oxide film surface treated unf thread series