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 5920-01-430-6921
NSN 5965-01-421-1244
NSN 5905-00-671-0625
NSN 6130-00-662-8557
NSN 6150-01-168-4176
NSN 6105-01-244-8504
NSN 5945-00-398-1072
NSN 6685-00-753-7668
NSN 5910-01-593-8046
NSN 4140-00-232-9859
NSN 5998-00-423-7121
NSN 5999-01-238-5762