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 6650-01-167-1311
NSN 6105-01-288-5003
NSN 5999-00-971-2361
NSN 5855-01-658-4510
NSN 5920-01-643-8287
NSN 5915-00-076-3738
NSN 5985-00-328-4000
NSN 6220-00-699-8105
NSN 6320-01-585-8468
NSN 5915-00-297-8831
NSN 6110-00-914-2420
NSN 5965-00-236-0016