MS90728F, MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISH HEXAGON BOLT), ALLOY STEEL, GRADE 8, ZINC COATED PLAIN AND SELF-LOCKING, UNC-2A (30 OCT 1984) [SUPERSEDED BY ANSI-B18.2.1].
MS90728F, MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISH HEXAGON BOLT), ALLOY STEEL, GRADE 8, ZINC COATED PLAIN AND SELF-LOCKING, UNC-2A (30 OCT 1984) [SUPERSEDED BY ANSI-B18.2.1].