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 6135-01-429-9029
NSN 6130-01-579-9990
NSN 6150-01-444-4219
NSN 5855-00-058-1293
NSN 5925-01-323-7756
NSN 6320-01-453-5152
NSN 5945-01-414-3878
NSN 5835-00-334-6556
NSN 6645-01-590-0788
NSN 5895-01-152-7887
NSN 5990-01-126-5824
NSN 6650-00-466-1697