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 Army 
Dept. of the Navy 
Brazil 
Spain 
Republic of Korea 
Portugal 
Italy 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6150-00-100-4757
NSN 6650-00-561-3762
NSN 5999-01-424-0713
NSN 5910-01-489-0966
NSN 5895-01-227-4742
NSN 5915-00-391-5735
NSN 6220-00-511-1769
NSN 5835-01-219-0586
NSN 5915-01-004-9319
NSN 6620-01-408-2989
NSN 5990-01-440-7135
NSN 5998-01-075-2163