3a thread class right-hand 1.964" thread length hexagon head style 3.688" grip length 18 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.287" thread length crowned hexagon head style 5.438" grip length 28 thread quantity per inch navy special project passivate fastener surface treated unjf thread series
3a thread class right-hand 0.425" thread length dished hexagon head style 0.865" grip length 28 thread quantity per inch passivate surface treated unjf thread series