MS51491 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, GRADE 5 UNC-2A (29 OCT 2004).
MS51491 (NOTICE 1), MILITARY STANDARD: SCREW, CAP, HEXAGON HEAD (FINISHED HEXAGON BOLT), STEEL, GRADE 5 UNC-2A (29 OCT 2004).