2a thread class right-hand 0.407" thread length pan head style 32 thread quantity per inch cadmium screw surface treated chromate conversion coat clear to light blue tint unc thread series
2a thread class right-hand 1.500" thread length hexagon head style 4.000" grip length 18 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.161" thread length headless (setscrew) head style 32 thread quantity per inch locking feature soft mail in thds cadmium surface treated unc thread series