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 6220-01-202-8907
NSN 5999-00-995-1438
NSN 6105-00-177-6300
NSN 4140-01-104-6353
NSN 4140-01-528-4310
NSN 6130-01-127-9610
NSN 2925-01-464-3093
NSN 5930-00-258-9997
NSN 5945-01-384-2765
NSN 6645-00-663-8111
NSN 5960-01-090-6979
NSN 5999-00-627-4316