3a thread class right-hand 0.375" thread length headless (setscrew) head style 40 thread quantity per inch chromate zinc surface treated unf thread series
right-hand 0.125" thread length hexagon head style 26 thread quantity per inch thread relieved groove 0.0625 in. wide to root of thread cadmium surface treated whitworth thread series
3a thread class right-hand 0.312" thread length headless (setscrew) head style 32 thread quantity per inch cadmium or zinc surface treated unf thread series
2a thread class right-hand 0.125" thread length headless (setscrew) head style 32 thread quantity per inch cadmium or chromate surface treated unc thread series
3a thread class right-hand 0.484" thread length flat chamfer head style 32 thread quantity per inch thread undercut 0.062 in. wide to root dia. at head passivate surface treated unf thread series