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 4140-01-340-9198
NSN 6650-00-182-7791
NSN 6110-01-463-2597
NSN 5999-00-228-2317
NSN 5985-01-187-2012
NSN 6320-01-029-4220
NSN 6110-01-198-1557
NSN 4140-01-103-7089
NSN 5990-01-331-7071
NSN 5915-01-399-3273
NSN 6105-01-085-3698
NSN 6130-00-066-9600