MS90521B (NOTICE), MILITARY STANDARD: UNION, PIPE, STEEL OR MALLEABLE IRON, THREADED CONNECTION (10 OCT 1974) [SUPERSEDED BY WW-U-531].
MS90521B (NOTICE), MILITARY STANDARD: UNION, PIPE, STEEL OR MALLEABLE IRON, THREADED CONNECTION (10 OCT 1974) [SUPERSEDED BY WW-U-531].