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 5905-01-427-3804
NSN 5920-01-509-7772
NSN 6320-01-380-7372
NSN 5930-01-487-5429
NSN 5910-01-305-3087
NSN 5999-00-178-0906
NSN 5950-01-557-7304
NSN 6610-01-216-7297
NSN 4140-00-332-5956
NSN 5950-00-620-3763
NSN 5950-01-473-4708
NSN 5895-01-525-5258