MS51983, MILITARY STANDARD: NUT, PLAIN, SINGLE BALL SEAT, HEXAGON WHEEL MOUNTING-3/4 AND 1-1/8 INCH (30 AUG 1982) [SUPERSEDED BY A-A-52427].
MS51983, MILITARY STANDARD: NUT, PLAIN, SINGLE BALL SEAT, HEXAGON WHEEL MOUNTING-3/4 AND 1-1/8 INCH (30 AUG 1982) [SUPERSEDED BY A-A-52427].