2a thread class right-hand 1.300" thread length hexagon extended washer head style 10 thread quantity per inch phosphate surface treated unc thread series
2a thread class right-hand 1.054" thread length hexagon head style 0.049" hole diameter 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.650" thread length hexagon extended washer head style 20 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.315" thread length flat chamfer head style 32 thread quantity per inch navy special project oxide surface treated unf thread series