MS51031B (NOTICE-1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, FLAT POINT, CORROSION-RESISTING STEEL, PASSIVATED, UNF-3A, PLAIN AND SELF-LOCKING (25-NOV-1998) [S/S BY NASM51031]

MS51031B (NOTICE-1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, FLAT POINT, CORROSION-RESISTING STEEL, PASSIVATED, UNF-3A, PLAIN AND SELF-LOCKING (25-NOV-1998) [S/S BY NASM51031]., MS51031B, dated 29 DECEMBER 1972, is hereby canceled and superseded by NASM51031. The Part Identification Numbers (PIN) for MS51031B and the part numbers for NASM51031 are identical. The part numbers have not been changed.