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 5965-01-017-9156
NSN 5915-01-277-6320
NSN 5999-01-363-4582
NSN 5855-01-051-1155
NSN 6130-01-431-8879
NSN 5965-01-644-7983
NSN 6150-01-544-8427
NSN 5855-01-381-5324
NSN 7035-01-548-5412
NSN 6240-00-916-5812
NSN 5965-00-812-9158
NSN 5960-01-134-1793