MS51981C (NOTICE 1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, OVAL POINT, ALLOY STEEL, CADMIUM PLATED, UNC-3A (25 NOV 1998) [SUPERSEDED BY NASM51981].
MS51981C (NOTICE 1), MILITARY STANDARD: SETSCREW-HEXAGON SOCKET, OVAL POINT, ALLOY STEEL, CADMIUM PLATED, UNC-3A (25 NOV 1998) [SUPERSEDED BY NASM51981].