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 5920-00-221-0877
NSN 6145-01-555-1404
NSN 6320-01-143-3597
NSN 6130-01-441-4920
NSN 5910-00-105-7536
NSN 5835-01-414-3258
NSN 6320-00-456-0836
NSN 5965-00-905-6895
NSN 5990-01-432-4984
NSN 5835-01-442-6079
NSN 5910-01-206-4519
NSN 5996-00-269-2655