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 6130-00-109-9091
NSN 5945-01-157-2381
NSN 6110-01-543-6350
NSN 5915-01-051-2511
NSN 5960-01-342-1961
NSN 5935-01-593-1686
NSN 6110-00-295-2754
NSN 6240-00-891-1508
NSN 7035-00-140-3070
NSN 6240-01-143-4812
NSN 6685-01-352-4564
NSN 5925-00-829-4897