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 4140-01-009-3003
NSN 5960-01-495-0859
NSN 6320-00-139-1090
NSN 6220-00-753-7664
NSN 2925-00-085-7332
NSN 5960-01-180-8000
NSN 6610-00-256-8006
NSN 6150-00-465-2974
NSN 5930-01-282-0494
NSN 5915-00-221-9610
NSN 6150-01-485-3181
NSN 5920-00-155-2173