MIL-W-5521B (AMENDMENT-2), MILITARY SPECIFICATION: WASHER, AIRCRAFT HYDRAULIC PACKING BACK-UP (20-NOV-2001) [S/S BY MIL-DTL-5521C]

MIL-W-5521B (AMENDMENT-2), MILITARY SPECIFICATION: WASHER, AIRCRAFT HYDRAULIC PACKING BACK-UP (20-NOV-2001) [S/S BY MIL-DTL-5521C]., This amendment forms a part of MIL-W-5521B dated 13 December 1968, and is approved for use by all Departments and Agencies of the Department of Defense.