MS20066A (NOTICE 2), MILITARY STANDARD: KEY, MACHINE, SQUARE IN CROSS-SECTION, BOTH ENDS SQUARE (21 JUN 1999) [SUPERSEDED BY NASM20066]
MS20066A (NOTICE 2), MILITARY STANDARD: KEY, MACHINE, SQUARE IN CROSS-SECTION, BOTH ENDS SQUARE (21 JUN 1999) [SUPERSEDED BY NASM20066].