3a thread class right-hand 0.295" thread length flat chamfer head style 0.033" hole diameter 40 thread quantity per inch cadmium surface treated unrc thread series
2a thread class right-hand 0.500" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.749" thread length hexagon head style 7.922" grip length 20 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.294" thread length flat chamfer head style 40 thread quantity per inch navy special project cadmium or nickel surface treated unc thread series