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 4140-00-230-4252
NSN 5930-00-817-2740
NSN 6145-01-571-6875
NSN 5920-00-993-1799
NSN 5985-01-029-2785
NSN 5960-01-530-1808
NSN 6650-01-346-1396
NSN 6105-01-480-6179
NSN 6685-01-477-9516
NSN 5835-01-025-8761
NSN 6105-01-433-1856
NSN 5985-00-491-2299