MS51021C (NOTICE-1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, CUP POINT, CORROSION RESISTING (CHROME-NICKEL) STEEL, PASSIVATED, UNC-3A PLAIN AND SELF LOCKING (30-SEP-1999) [S/S BY NASM51021]

MS51021C (NOTICE-1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, CUP POINT, CORROSION RESISTING (CHROME-NICKEL) STEEL, PASSIVATED, UNC-3A PLAIN AND SELF LOCKING (30-SEP-1999) [S/S BY NASM51021]., MS51021C, dated 29 DECEMBER 1972, is hereby canceled and superseded by NASM51021. The Part Identification Number (PIN) for MS51021C and the part number for NASM51021 are identical. The part numbers have not been changed.