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 4140-01-398-7330
NSN 5996-01-388-7618
NSN 5925-00-473-2622
NSN 6135-00-087-5300
NSN 6620-01-460-9201
NSN 5920-00-538-6758
NSN 5960-01-649-1341
NSN 6105-00-541-8472
NSN 5920-00-212-7505
NSN 6145-01-156-7866
NSN 5990-01-514-8030
NSN 6105-00-244-3007