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 6150-01-254-1664
NSN 6645-01-557-8134
NSN 6650-00-544-5497
NSN 5960-01-549-4826
NSN 5935-00-205-9563
NSN 5915-00-572-7761
NSN 6320-01-562-1599
NSN 6130-00-276-0658
NSN 6110-00-937-5800
NSN 5905-00-478-2612
NSN 6645-01-633-1852
NSN 5950-00-581-9999