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 5915-00-731-1748
NSN 5895-01-558-5341
NSN 5990-01-386-5561
NSN 5998-01-441-0005
NSN 6645-00-912-6245
NSN 5925-01-271-0701
NSN 5895-01-475-4343
NSN 6620-00-456-0404
NSN 5905-00-231-9840
NSN 5920-01-386-3115
NSN 5925-01-370-3458
NSN 6240-01-516-5589