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 4140-00-358-9965
NSN 5935-00-931-7072
NSN 4140-00-205-0853
NSN 5935-01-260-9476
NSN 2925-00-816-8765
NSN 5855-01-100-3272
NSN 6110-00-351-8010
NSN 4140-00-925-5188
NSN 6320-00-174-1362
NSN 7035-01-223-0104
NSN 5835-00-389-2816
NSN 6135-00-871-3646