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 5975-01-139-4128
NSN 5996-01-302-6362
NSN 6620-00-424-4335
NSN 5920-00-449-4324
NSN 6220-01-025-8551
NSN 5935-00-497-6222
NSN 5945-01-607-0980
NSN 6150-01-323-6378
NSN 5975-01-370-3979
NSN 5990-01-107-1003
NSN 2925-00-486-8640
NSN 5910-01-504-9697