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 5945-00-227-7303
NSN 5855-01-519-2486
NSN 5855-00-174-3482
NSN 6240-01-553-1387
NSN 5855-01-197-2774
NSN 6645-00-155-2398
NSN 6645-01-633-1852
NSN 5960-01-274-3571
NSN 6645-01-547-5748
NSN 5930-00-261-7071
NSN 6650-00-973-9533
NSN 6320-00-731-6134