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 6620-01-542-8709
NSN 5905-01-357-1110
NSN 5998-01-634-0604
NSN 6220-01-123-8878
NSN 5999-00-043-4397
NSN 5920-00-526-0462
NSN 6620-01-415-5803
NSN 6620-01-521-0435
NSN 6645-01-023-8020
NSN 6320-01-530-4870
NSN 6650-01-465-5362
NSN 5905-00-466-0419