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 5910-01-290-2968
NSN 5920-00-479-5254
NSN 5945-00-394-2754
NSN 6685-00-548-5460
NSN 5996-01-287-7464
NSN 5915-00-067-4227
NSN 6240-01-344-9562
NSN 5996-01-556-9481
NSN 6620-01-026-0346
NSN 5930-01-480-3272
NSN 6650-01-172-2226
NSN 4140-00-388-2979