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 5950-01-578-1113
NSN 5910-01-363-4162
NSN 5935-01-432-3828
NSN 5990-01-164-8673
NSN 5935-00-725-7723
NSN 6145-01-580-0334
NSN 2925-01-458-5808
NSN 6135-01-466-3980
NSN 6320-01-036-2598
NSN 6685-01-515-5647
NSN 5998-01-239-9758
NSN 5960-00-971-1483