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 2925-00-964-7128
NSN 5920-01-067-2944
NSN 6650-00-364-7866
NSN 6130-01-367-9449
NSN 6650-01-268-6226
NSN 5950-01-615-8492
NSN 6645-01-071-7515
NSN 6220-01-223-6206
NSN 5905-00-851-0640
NSN 6105-01-508-3471
NSN 5950-01-384-3401
NSN 4140-00-415-6513