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 5855-00-973-5717
NSN 5855-00-832-9341
NSN 5998-01-135-7660
NSN 6110-00-678-1954
NSN 5920-00-529-0618
NSN 5998-01-556-9947
NSN 5965-00-062-0559
NSN 5999-01-451-5707
NSN 6240-01-245-0137
NSN 5920-01-504-1116
NSN 5915-01-196-6016
NSN 6220-01-050-8923