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 5855-01-110-9564
NSN 5985-01-490-7751
NSN 5945-01-206-4334
NSN 5920-00-777-6490
NSN 5905-01-359-9729
NSN 5910-01-236-3101
NSN 5935-01-519-3376
NSN 6220-00-520-0333
NSN 6610-00-451-3325
NSN 6650-01-049-1881
NSN 5950-01-024-5566
NSN 5960-01-395-9834