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 6110-00-758-2051
NSN 5920-01-569-2896
NSN 6320-01-113-7647
NSN 6135-01-553-7711
NSN 5998-01-481-1152
NSN 2925-00-480-9068
NSN 6130-00-148-8784
NSN 6135-01-351-2690
NSN 5998-01-113-7120
NSN 6240-00-752-2581
NSN 5996-00-021-2112
NSN 5905-01-051-2050