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 7035-00-849-5526
NSN 6150-01-170-5351
NSN 5905-01-070-6307
NSN 6610-00-933-5951
NSN 6240-01-114-1926
NSN 6650-00-158-3683
NSN 5915-00-338-1576
NSN 4140-01-173-7869
NSN 5985-00-081-0163
NSN 4140-01-456-3903
NSN 7035-01-027-2259
NSN 5930-01-219-2859