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 6240-00-960-8458
NSN 4140-00-521-0380
NSN 5999-01-442-5744
NSN 4140-01-094-8778
NSN 5925-01-579-3744
NSN 5960-01-227-5245
NSN 6130-01-394-7031
NSN 5930-01-369-6744
NSN 5915-00-269-2748
NSN 5945-01-582-2185
NSN 5935-01-202-1673
NSN 5935-00-024-0337