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 5996-00-276-5480
NSN 5999-01-530-9441
NSN 7035-00-782-7046
NSN 6110-00-244-4907
NSN 6320-01-532-4026
NSN 5835-00-920-7325
NSN 5985-00-953-1519
NSN 5925-01-435-8109
NSN 5920-00-853-4893
NSN 6610-01-165-2104
NSN 6135-01-017-3001
NSN 5945-01-041-6782