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 5920-01-458-0348
NSN 4140-01-059-2095
NSN 5895-00-188-6798
NSN 5945-01-415-6049
NSN 5920-00-410-7849
NSN 6240-01-660-1680
NSN 5935-01-367-2245
NSN 6650-00-959-6869
NSN 6105-01-477-7491
NSN 6130-01-514-0755
NSN 6650-01-235-0981
NSN 6145-00-930-4972