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 4140-00-758-7686
NSN 5930-01-091-5949
NSN 5920-00-409-9202
NSN 5905-01-392-3827
NSN 6130-01-341-9690
NSN 6240-01-350-3533
NSN 5930-00-929-9616
NSN 6240-01-227-4178
NSN 7035-01-243-8523
NSN 5920-01-659-3157
NSN 6320-01-333-5782
NSN 5998-01-583-3239