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 6240-01-337-2509
NSN 4140-00-155-8012
NSN 2925-01-412-9520
NSN 5910-01-386-7403
NSN 6240-01-469-0074
NSN 5920-01-397-1280
NSN 5990-00-060-7009
NSN 5998-00-938-1783
NSN 5930-01-142-7058
NSN 5930-00-448-5601
NSN 5975-01-327-3296
NSN 6685-00-845-2190