3a thread class right-hand 0.360" thread length hexagon extended washer head style 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.631" thread length flat countersunk head style 0.302" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.378" thread length flat countersunk head style 2.240" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 1.016" thread length dished hexagon head style 2.115" grip length 16 thread quantity per inch cadmium surface treated unjf thread series