2a thread class right-hand 0.417" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.075" thread length headless (setscrew) head style 40 thread quantity per inch cup point 0.125 in. diameter phosphate surface treated uns thread series
3a thread class right-hand 0.359" thread length button head style 28 thread quantity per inch navy special project chromium grip surface treated unf thread series
3a thread class right-hand 0.406" thread length hexagon head style 3.250" grip length 20 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.406" thread length hexagon head style 4.000" grip length 20 thread quantity per inch cadmium surface treated unf thread series