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 6240-00-334-6766
NSN 5998-01-388-3310
NSN 6150-00-400-2952
NSN 6620-00-526-8722
NSN 6650-01-287-4519
NSN 6220-01-417-8067
NSN 6685-01-316-2646
NSN 5855-01-147-4785
NSN 2925-01-318-8853
NSN 5990-00-620-1137
NSN 5930-01-136-5899
NSN 5996-01-131-4115