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 5905-00-290-8098
NSN 5999-00-119-0764
NSN 6150-00-278-7070
NSN 5905-00-824-5250
NSN 5925-01-453-1110
NSN 5835-01-226-2337
NSN 5855-01-141-8227
NSN 5910-01-422-1110
NSN 2925-01-026-1000
NSN 5930-01-332-3766
NSN 5999-00-260-0471
NSN 4140-01-100-1223