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 5935-00-176-2581
NSN 5998-01-217-7151
NSN 6130-00-361-7114
NSN 5960-00-783-6027
NSN 6610-01-246-4164
NSN 6650-01-188-4516
NSN 6650-01-519-5552
NSN 5835-00-518-4507
NSN 5990-01-384-2697
NSN 6685-01-113-2514
NSN 5835-01-363-4527
NSN 5910-01-539-9571