3b thread class right-hand 20 thread quantity per inch nut width rounded by 1.160 in. radius on countersunk side, max surfacefinish, 125 microinches aa o/a
L0.5625 dia by 0.50 lg, 4130 steelbar stock, heat treat 160000-180000 ps i per bac 5617, fin size 0.529/0.519 dia by 0.359/0.356 lg.drilled & tappedfor 10-32 2b helicoil no BACS13W3CN3 set screw lgm-30 minuteman
2b thread class right-hand 36 thread quantity per inch navy special project two 0.139 in. dia holes spaced equally on each side of tapped hole 0.687 in. c to c passivate surface treated
3b thread class right-hand 12 thread quantity per inch upper thread deformed to provide self-locking feature; dry film lubricated cadmium surface treated