3a thread class right-hand 0.345" thread length dished hexagon head style 2.178" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.370" thread length flat countersunk head style 0.178" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.667" thread length double hexagon extended washer head style 0.060" hole diameter 24 thread quantity per inch unjf thread series