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 5999-01-364-4950
NSN 6110-01-381-1269
NSN 6610-01-253-1449
NSN 6135-01-528-6896
NSN 5950-00-306-4648
NSN 5925-00-081-9135
NSN 6150-01-543-5565
NSN 5895-00-469-8047
NSN 6130-01-448-3492
NSN 6150-01-559-5210
NSN 5855-01-556-2665
NSN 5950-01-201-8117