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 5895-00-398-0029
NSN 6110-00-404-9352
NSN 6135-00-921-6487
NSN 6610-00-034-3709
NSN 6110-00-607-8465
NSN 5945-01-381-1268
NSN 6610-00-719-6441
NSN 5835-00-725-2087
NSN 5999-01-225-0668
NSN 5996-01-459-0585
NSN 5998-01-449-1467
NSN 5975-00-994-5648