3a thread class right-hand 1.016" thread length dished hexagon head style 0.865" grip length 16 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.251" thread length pan head style 2.240" grip length 32 thread quantity per inch cadmium fastener surface treated unjf thread series
2a thread class right-hand 0.620" thread length flat chamfer head style 32 thread quantity per inch navy special project shoulder 2.880 in. nom lg; relief slot between head passivate surface treated unf thread series