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 5996-00-885-0399
NSN 5950-00-920-4452
NSN 6240-01-407-8408
NSN 5998-00-537-3541
NSN 5925-00-226-1155
NSN 5855-01-476-4219
NSN 5960-00-135-9489
NSN 5855-01-456-8667
NSN 5910-00-320-8851
NSN 6135-01-428-8821
NSN 5965-01-446-6001
NSN 5835-00-136-2322