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 6645-01-056-5291
NSN 5905-00-917-4610
NSN 2925-01-261-0701
NSN 5975-01-425-8478
NSN 5985-01-432-3976
NSN 6685-00-886-4105
NSN 5930-01-240-0476
NSN 5965-01-365-0101
NSN 5998-01-180-6937
NSN 5930-01-198-1818
NSN 5945-01-634-0588
NSN 6220-01-037-8793