3a thread class right-hand 0.365" thread length headless (setscrew) head style 32 thread quantity per inch clear to light blue tint chromate cadmium surface treated unc thread series
3a thread class right-hand 0.455" thread length double hexagon w/hole head style 1.115" grip length 24 thread quantity per inch cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length hexagon head style 0.990" grip length 28 thread quantity per inch aluminum surface treated unjf thread series