3a thread class right-hand 0.432" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series
3a thread class right-hand 0.740" thread length hexagon head style 0.190" grip length 28 thread quantity per inch color black oxide surface treated unjf thread series
3a thread class right-hand 0.140" thread length hexagon head style 56 thread quantity per inch navy special project passivate surface treated unc thread series