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 5990-00-422-2093
NSN 6105-00-454-6270
NSN 7035-01-044-0136
NSN 6145-00-705-6686
NSN 6150-00-283-2377
NSN 6145-01-389-2357
NSN 6110-01-461-5116
NSN 6645-00-033-8714
NSN 4140-01-036-7178
NSN 5855-01-430-0132
NSN 5990-00-395-5703
NSN 5930-00-707-6899