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 6645-01-503-8211
NSN 5985-01-534-7728
NSN 5930-00-809-2515
NSN 6685-01-465-3129
NSN 5920-01-315-8080
NSN 5965-01-527-1220
NSN 4140-01-623-8053
NSN 5975-01-257-1220
NSN 6320-01-506-9439
NSN 5945-01-363-9817
NSN 6150-00-900-4984
NSN 4140-00-468-5342