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 5905-00-518-2666
NSN 4140-00-188-3800
NSN 5895-01-528-0252
NSN 4140-01-033-4953
NSN 6220-01-314-9594
NSN 5996-01-495-0763
NSN 5985-00-518-3872
NSN 5905-01-634-0595
NSN 5835-00-901-4932
NSN 5930-01-391-1263
NSN 5990-00-399-9241
NSN 6145-01-386-3976