3a thread class right-hand 0.516" thread length hexagon head style 24 thread quantity per inch undercut 0.031 in. lg by 0.016 in. radius under head, 0.007 in. radius between shoulder unf thread series
2a thread class right-hand 0.800" thread length flat chamfer head style 18 thread quantity per inch navy special project dog point 0.218 in. min 0.219 in. max dia passivate surface treated unc thread series
3a thread class right-hand 0.313" thread length 2.595" overall length 13 thread quantity per inch undercut 0.386 to 0.396 in. dia between shoulder round, closed w/shoulder unc thread series