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 4140-01-098-4677
NSN 5965-01-572-9399
NSN 5965-01-376-1012
NSN 5990-01-507-7495
NSN 6320-01-532-7491
NSN 5925-01-239-6743
NSN 5960-00-836-2561
NSN 6240-01-459-6965
NSN 6685-01-261-2983
NSN 6150-01-468-6745
NSN 5999-00-189-7500
NSN 5935-01-401-5324