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 6220-01-144-7175
NSN 5930-01-065-0890
NSN 6135-01-459-6424
NSN 5999-01-634-0576
NSN 5895-01-537-0131
NSN 6150-01-603-8242
NSN 6620-01-491-1434
NSN 7035-00-252-7467
NSN 4140-01-178-4585
NSN 5895-01-088-6772
NSN 4140-00-349-8704
NSN 5835-01-442-6079