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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 2925-01-345-7433
NSN 5998-01-281-0071
NSN 5835-01-608-4285
NSN 7035-01-026-1171
NSN 5999-01-270-0965
NSN 5945-00-120-0074
NSN 5998-01-508-7966
NSN 5985-01-044-6027
NSN 5930-01-417-3109
NSN 6105-00-177-3175
NSN 6110-01-219-5233
NSN 6620-00-382-8605