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 6150-00-964-7303
NSN 5895-01-537-0290
NSN 5950-00-019-8503
NSN 4140-00-255-2089
NSN 5930-01-180-7203
NSN 5895-01-350-3527
NSN 6240-00-505-6099
NSN 6135-00-519-1325
NSN 6130-01-083-1387
NSN 6650-00-927-3391
NSN 5905-01-063-7938
NSN 5998-01-196-5469