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 5990-01-649-4647
NSN 6320-00-674-1361
NSN 5965-00-773-9047
NSN 5999-01-336-6385
NSN 5910-00-115-3614
NSN 6320-01-311-3286
NSN 6130-01-331-5096
NSN 6650-00-404-1788
NSN 2925-00-152-1825
NSN 5999-01-386-3616
NSN 6150-00-168-4921
NSN 5895-01-605-0160