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 5920-01-187-8391
NSN 5920-00-242-2758
NSN 6610-00-318-5735
NSN 5910-00-997-9510
NSN 5999-00-661-0954
NSN 5905-00-376-1771
NSN 6110-00-035-8794
NSN 5910-01-477-7829
NSN 5920-00-951-5050
NSN 5920-01-250-8793
NSN 5975-01-322-8515
NSN 5999-00-781-3116