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 5910-01-227-1939
NSN 5950-00-679-5446
NSN 6620-01-144-2488
NSN 5965-01-120-6086
NSN 5965-01-550-4425
NSN 6620-01-203-4369
NSN 5990-00-241-3780
NSN 5905-00-216-6576
NSN 5905-00-338-7701
NSN 6645-01-089-6459
NSN 5945-01-245-4520
NSN 5920-00-987-1605