3a thread class right-hand 0.380" thread length flat countersunk head style 1.490" grip length 32 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.345" thread length dished hexagon head style 1.615" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.345" thread length dished hexagon head style 3.365" grip length 28 thread quantity per inch cadmium surface treated unjf thread series