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 5905-01-421-9686
NSN 4140-00-643-3744
NSN 6220-01-270-5118
NSN 6650-01-027-1181
NSN 5935-01-417-2122
NSN 5855-01-557-6277
NSN 5905-01-418-5125
NSN 5985-01-252-2467
NSN 4140-01-382-6831
NSN 6150-01-237-5998
NSN 5945-01-422-4565
NSN 5945-01-480-0930