MS21042M (NOTICE 1), MILITARY SPECIFICATION SHEET: NUT, SELF-LOCKING, 450 DEG. F, REDUCED HEXAGON, REDUCED HEIGHT, RING BASE, NON-CORROSION RESISTANT STEEL (22 JUN 1999) [S/S BY NASM21042]

MS21042M (NOTICE 1), MILITARY SPECIFICATION SHEET: NUT, SELF-LOCKING, 450 DEG. F, REDUCED HEXAGON, REDUCED HEIGHT, RING BASE, NON-CORROSION RESISTANT STEEL (22 JUN 1999) [S/S BY NASM21042]., MS21042M, dated 6 JANUARY 1995, is hereby canceled and superseded by NASM21042. The Part Identification Numbers (PIN) for MS21042M and the part numbers for NASM21042 are identical. The part numbers have not been changed.