MS16998E, MILITARY SPECIFICATION SHEET: SCREW, CAP, SOCKET HEAD AND SCREW, CAP, SOCKET HEAD, SELF-LOCKING: ALLOY STEEL, CADMIUM PLATED, UNF-3A (31 DEC 1976) [SUPERSEDED BY NAS1351]
MS16998E, MILITARY SPECIFICATION SHEET: SCREW, CAP, SOCKET HEAD AND SCREW, CAP, SOCKET HEAD, SELF-LOCKING: ALLOY STEEL, CADMIUM PLATED, UNF-3A (31 DEC 1976) [SUPERSEDED BY NAS1351].