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 6650-01-646-0139
NSN 5998-01-457-5342
NSN 6145-01-168-5680
NSN 7035-00-513-9764
NSN 5835-01-392-7683
NSN 5999-01-217-4856
NSN 6150-01-293-3586
NSN 5960-00-628-2003
NSN 5998-01-229-6329
NSN 4140-01-568-5095
NSN 7035-00-897-7567
NSN 5930-00-494-1825