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 5925-00-959-6075
NSN 6150-01-381-0504
NSN 6650-01-444-1229
NSN 6240-01-353-5029
NSN 6135-00-877-1659
NSN 6150-01-463-3113
NSN 5999-01-217-5811
NSN 6320-01-056-1164
NSN 5905-01-054-6227
NSN 5930-01-501-2332
NSN 5905-01-119-4259
NSN 6320-01-170-4068