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 5855-01-212-1623
NSN 5905-01-600-0179
NSN 5990-00-660-8885
NSN 6135-00-995-1089
NSN 6610-01-576-8955
NSN 5910-01-458-4441
NSN 5950-01-270-3565
NSN 5910-01-341-8942
NSN 5960-00-888-6740
NSN 5945-01-520-5387
NSN 6650-01-494-6338
NSN 6645-00-947-0625