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 2925-01-411-4666
NSN 6220-01-399-8225
NSN 5930-01-500-9601
NSN 5990-01-160-6978
NSN 5935-01-116-0927
NSN 5998-00-869-0178
NSN 5999-00-528-2263
NSN 5998-00-245-3128
NSN 5999-01-431-8589
NSN 5835-00-835-7838
NSN 5996-01-369-4964
NSN 5915-00-315-3583