MS9561E (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (12 JAN 1995).
MS9561E (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (12 JAN 1995).