MS51490 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, GRADE 5, UNF-2A (18 NOV 1999).
MS51490 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, GRADE 5, UNF-2A (18 NOV 1999).