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 6620-00-483-1961
NSN 5996-01-444-3915
NSN 5910-01-605-7651
NSN 6110-00-868-2103
NSN 5950-00-131-8323
NSN 5855-01-145-8973
NSN 6685-01-600-0433
NSN 5910-01-078-1559
NSN 6150-00-144-7115
NSN 6320-00-468-8421
NSN 5996-01-470-0148
NSN 5855-00-149-0766