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 5975-01-631-4222
NSN 5999-00-908-4118
NSN 5960-01-300-6788
NSN 5835-01-469-6009
NSN 4140-01-020-1116
NSN 5990-00-885-4020
NSN 6150-01-130-0793
NSN 2925-00-483-9357
NSN 5920-01-438-9399
NSN 7035-01-487-6481
NSN 6650-01-232-0275
NSN 5910-01-045-2472