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 4140-01-044-3366
NSN 5945-00-682-4375
NSN 6650-00-202-4540
NSN 5998-01-532-9828
NSN 6135-01-036-0432
NSN 5895-01-310-0339
NSN 5920-01-464-3105
NSN 5990-01-501-9094
NSN 5895-01-215-3934
NSN 4140-00-798-9144
NSN 6240-01-412-0715
NSN 5930-01-261-2896