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 2925-01-646-9112
NSN 6110-00-082-0268
NSN 5920-00-958-7202
NSN 5945-01-163-2604
NSN 5905-00-626-6248
NSN 6130-01-600-1808
NSN 5935-00-564-5434
NSN 6145-01-473-1698
NSN 5965-01-578-7378
NSN 2925-01-571-6062
NSN 5990-01-219-2703
NSN 6240-00-270-8182