A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.
Dept. of the Navy 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6145-00-567-7413
NSN 5915-01-656-0034
NSN 6645-00-526-9476
NSN 5835-00-113-6090
NSN 5920-01-471-3366
NSN 5950-00-563-4113
NSN 5985-01-657-7079
NSN 5930-00-741-9984
NSN 4140-00-908-2763
NSN 5905-01-527-7661
NSN 5960-01-503-0362
NSN 5965-01-012-1065