2a thread class right-hand 0.515" thread length crowned hexagon head style 0.188" hole diameter 24 thread quantity per inch concentric hole threaded unf thread series
3a thread class right-hand 0.425" thread length flat chamfer head style 0.240" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.345" thread length dished hexagon head style 2.115" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.378" thread length flat countersunk head style 0.302" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.263" thread length crowned hexagon head style 0.312" grip length 32 thread quantity per inch navy special project passivate surface treated unjf thread series
3a thread class right-hand 0.378" thread length flat countersunk head style 0.552" grip length 28 thread quantity per inch cadmium surface treated unjf thread series