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 5915-01-350-3696
NSN 5996-00-191-2133
NSN 5999-01-083-6315
NSN 5905-01-418-6901
NSN 6645-01-258-5558
NSN 5920-00-280-8348
NSN 5915-01-318-9446
NSN 4140-01-107-7382
NSN 6150-00-936-0670
NSN 5975-01-007-7075
NSN 5999-01-518-3260
NSN 7035-01-331-5614