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 5920-01-278-9239
NSN 5950-00-488-1971
NSN 5935-00-978-6736
NSN 7035-00-079-7189
NSN 6320-00-682-3448
NSN 6105-00-044-3269
NSN 6320-01-145-9013
NSN 5999-00-021-7819
NSN 4140-00-170-5152
NSN 2925-00-105-3907
NSN 5996-01-564-2666
NSN 6220-01-360-1795