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.
Dept. of the Navy 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5835-00-958-6231
NSN 5905-00-392-5508
NSN 5985-01-609-3747
NSN 5990-01-178-4033
NSN 5975-01-512-8525
NSN 5975-00-004-9431
NSN 5920-01-175-5949
NSN 6650-00-420-3593
NSN 5999-01-176-3449
NSN 5910-01-545-0280
NSN 5998-00-983-7088
NSN 5905-01-096-6160