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 6650-01-048-6757
NSN 2925-00-504-2363
NSN 6645-01-322-8431
NSN 6645-01-481-9834
NSN 5998-01-357-6348
NSN 5915-00-546-7684
NSN 5975-01-132-9769
NSN 5996-01-194-5249
NSN 6130-00-086-8976
NSN 5920-00-930-1212
NSN 5990-01-503-0194
NSN 5965-00-492-1737