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 5835-01-455-3380
NSN 7035-00-115-1886
NSN 6610-00-771-7570
NSN 5998-00-231-1998
NSN 6105-01-510-1828
NSN 5835-00-679-4604
NSN 5855-00-004-0904
NSN 5915-01-088-8649
NSN 5975-01-142-2176
NSN 6145-00-100-4358
NSN 5920-01-489-7090
NSN 6135-00-917-1894