MS9554D, MILITARY STANDARD: SCREW, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .138-40 UNJF-3A (20 APR 1993) [SUPERSEDED BY SAE-AS9554]

MS9554D, MILITARY STANDARD: SCREW, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .138-40 UNJF-3A (20 APR 1993) [SUPERSEDED BY SAE-AS9554].