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 5920-00-083-8621
NSN 6110-00-165-1528
NSN 5975-00-636-4910
NSN 5835-01-537-1228
NSN 5930-01-516-3308
NSN 4140-01-264-9640
NSN 5920-01-093-8458
NSN 6685-00-525-5698
NSN 5950-01-616-8243
NSN 6135-01-031-3032
NSN 5945-01-031-9018
NSN 5945-01-468-1355