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 4140-01-287-1308
NSN 6320-01-592-6248
NSN 5920-00-822-2327
NSN 2925-00-964-7128
NSN 5945-00-517-9566
NSN 5905-01-535-1343
NSN 5895-00-147-4101
NSN 5920-01-271-2304
NSN 6685-01-081-0365
NSN 6150-00-972-5229
NSN 5915-01-175-5736
NSN 5996-00-776-2914