2a thread class right-hand 0.562" thread length knurled no. 1 head style 20 thread quantity per inch w/cone point passivate surface treated unc thread series
3a thread class right-hand 0.367" thread length hexagon head style 0.796" grip length 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.594" thread length flat chamfer head style 16 thread quantity per inch navy special project phosphate surface treated unc thread series