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 6650-01-037-9755
NSN 5905-01-239-0512
NSN 6650-01-119-3058
NSN 5910-01-280-6429
NSN 6650-01-106-1441
NSN 4140-01-092-1098
NSN 5905-01-533-6182
NSN 5915-01-190-9476
NSN 2925-00-221-8529
NSN 5960-00-185-9974
NSN 2925-00-254-9776
NSN 5835-00-841-2650