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 5990-00-197-0159
NSN 6650-00-256-9059
NSN 6110-00-821-5534
NSN 6135-00-269-5843
NSN 4140-00-493-9675
NSN 6110-01-069-2966
NSN 5998-01-511-9792
NSN 5930-01-528-7771
NSN 5935-01-237-1427
NSN 7035-01-160-4423
NSN 5930-01-395-2053
NSN 6105-01-560-2744