MS51478 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON (FINISHED HEXAGON BOLT), HEAD DRILLED FOR LOCKING WIRE ALLOY STEEL, GRADE 8, UNF-2A (01 OCT 1997).
MS51478 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON (FINISHED HEXAGON BOLT), HEAD DRILLED FOR LOCKING WIRE ALLOY STEEL, GRADE 8, UNF-2A (01 OCT 1997).