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 
Portugal 
Greece Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5965-00-651-7372
NSN 5960-01-338-0688
NSN 6110-00-384-1704
NSN 5960-01-658-9538
NSN 5960-01-399-4327
NSN 5945-00-081-5482
NSN 6645-00-991-8704
NSN 5920-01-232-6463
NSN 5915-01-182-7487
NSN 5996-01-596-5389
NSN 5920-01-246-5678
NSN 7035-00-417-2967