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 4140-00-083-1121
NSN 5999-01-117-7167
NSN 6610-01-510-8687
NSN 2925-00-394-2332
NSN 5835-00-264-0946
NSN 6150-00-216-6542
NSN 5998-00-249-7289
NSN 7035-00-679-9027
NSN 5905-01-211-7720
NSN 6130-01-260-0156
NSN 6240-00-865-3257
NSN 6220-01-119-0742