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 5935-00-145-5922
NSN 6650-01-121-6904
NSN 5998-01-088-8373
NSN 6110-01-449-1988
NSN 5990-01-432-0523
NSN 5920-01-505-1725
NSN 5915-01-265-0862
NSN 6145-01-130-5416
NSN 6135-00-983-9187
NSN 2925-01-054-3190
NSN 6650-01-024-9554
NSN 6150-00-596-9253