2a thread class right-hand 0.180" thread length hexagon head style 28 thread quantity per inch threaded concetric hole in head 0.164-32 unc 2b by 0.125 in. min deep. 0.161 in. dia concentric hole in threaded end 0.400 in lg nickel surface treated unf thread series
3a thread class right-hand 0.450" thread length hexagon head style 0.046" hole diameter 32 thread quantity per inch cadmium surface treated unf thread series