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 6150-01-555-8053
NSN 6645-01-470-2951
NSN 2925-01-068-3844
NSN 5950-00-222-7491
NSN 5945-01-167-8148
NSN 6150-00-189-6100
NSN 5945-01-484-0550
NSN 6240-00-458-4662
NSN 4140-01-605-9845
NSN 6150-01-071-2174
NSN 5835-01-246-0972
NSN 6150-01-064-9750