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 5960-01-433-7565
NSN 5910-01-443-1968
NSN 6620-00-948-6751
NSN 5960-01-357-1261
NSN 6240-01-152-2662
NSN 5930-00-176-2646
NSN 5998-01-196-6131
NSN 5985-00-141-9036
NSN 5925-01-322-4366
NSN 5996-01-032-4942
NSN 5855-01-429-8702
NSN 6105-01-371-1635