MS9561E (AMENDMENT 2), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (29 APR 1996).
MS9561E (AMENDMENT 2), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (29 APR 1996).