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 Army 
Dept. of the Navy 
Brazil 
Spain 
Republic of Korea 
Portugal 
Italy 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 7035-01-123-8723
NSN 6650-01-582-8686
NSN 6650-00-851-4772
NSN 4140-00-190-0162
NSN 5945-01-331-8638
NSN 5965-01-314-7333
NSN 5935-00-097-8940
NSN 6105-01-326-6578
NSN 7035-01-429-7954
NSN 5895-01-276-7242
NSN 5855-01-457-3608
NSN 6650-01-556-1929