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 5835-00-789-1454
NSN 5910-00-788-3785
NSN 5920-01-248-7266
NSN 5990-01-512-9129
NSN 5915-00-054-6637
NSN 5975-01-600-0347
NSN 5990-01-643-4167
NSN 6135-01-522-3386
NSN 5985-01-511-2992
NSN 6130-01-074-3427
NSN 5905-01-532-6127
NSN 5996-01-234-4147