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 5990-01-193-0487
NSN 6320-01-129-9656
NSN 6135-01-467-5100
NSN 5925-00-272-8959
NSN 6110-01-286-4075
NSN 6105-00-887-3793
NSN 6320-01-054-3046
NSN 5950-00-972-7343
NSN 5930-00-133-0976
NSN 6135-00-968-8594
NSN 6145-01-118-6442
NSN 7035-00-096-9986