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 5910-01-040-1250
NSN 6240-01-276-9417
NSN 5835-01-307-8954
NSN 6110-00-363-3974
NSN 5945-00-136-7013
NSN 6320-01-366-5157
NSN 6685-00-198-9506
NSN 6320-01-215-2284
NSN 5930-01-650-2879
NSN 6130-00-736-4382
NSN 4140-01-008-8701
NSN 6110-01-113-6968