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 4140-00-181-3547
NSN 5985-01-024-9640
NSN 5925-01-495-3727
NSN 6650-01-236-5916
NSN 6135-01-048-0910
NSN 5895-00-901-2186
NSN 5915-01-083-0070
NSN 5990-00-140-1159
NSN 6610-01-168-7943
NSN 5990-00-574-5777
NSN 5960-01-226-7297
NSN 6145-01-619-0313