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 5996-01-459-6112
NSN 5996-00-454-7938
NSN 6620-00-959-6614
NSN 5895-01-437-1564
NSN 6150-01-525-1178
NSN 6620-01-423-0833
NSN 5920-01-290-3771
NSN 5855-00-247-7219
NSN 6135-01-242-6484
NSN 6645-00-389-3370
NSN 5930-00-703-1978
NSN 6320-01-531-4997