MS51038B, MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, CONE POINT, CORROSION-RESISTING STEEL, PASSIVATED, UNC-3A AND UNF-3A, PLAIN AND SELF-LOCKING (29-DEC-1972) [SUPERSEDING MS51039] [S/S BY NASM51038]
MS51038B, MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, CONE POINT, CORROSION-RESISTING STEEL, PASSIVATED, UNC-3A AND UNF-3A, PLAIN AND SELF-LOCKING (29-DEC-1972) [SUPERSEDING MS51039] [S/S BY NASM51038].