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 6645-01-388-0391
NSN 6240-00-931-2395
NSN 6650-01-482-6021
NSN 5925-01-246-5464
NSN 6320-01-140-9343
NSN 5998-01-364-7796
NSN 5915-01-462-4834
NSN 6145-01-332-4553
NSN 6220-01-406-2970
NSN 5965-00-772-8024
NSN 5925-01-575-9558
NSN 7035-01-413-2018