3a thread class right-hand 0.375" thread length flat countersunk head style 0.125" grip length 32 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.506" thread length oval countersunk head style 0.178" grip length 24 thread quantity per inch aluminum surface treated unjf thread series
3a thread class right-hand 0.569" thread length flat countersunk head style 2.990" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length flat countersunk head style 0.490" grip length 28 thread quantity per inch cadmium surface treated unjf thread series