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.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6620-00-935-1321
NSN 5985-01-517-5030
NSN 6105-01-417-2174
NSN 6150-01-521-3585
NSN 5965-00-182-7928
NSN 6645-01-099-2910
NSN 6650-01-496-2662
NSN 5920-00-906-0530
NSN 5985-01-069-8566
NSN 6620-01-633-8443
NSN 6135-01-412-0404
NSN 5925-00-800-5350