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 4140-01-072-8326
NSN 2925-01-434-2502
NSN 6320-00-225-7013
NSN 6135-01-280-2883
NSN 5985-00-980-6896
NSN 6145-01-659-8072
NSN 5965-00-226-7870
NSN 5925-01-135-5272
NSN 5915-01-604-9868
NSN 5855-01-420-2746
NSN 5930-00-753-2335
NSN 6110-00-369-1586