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 6150-00-693-4818
NSN 5835-01-610-5744
NSN 5835-00-552-0734
NSN 5915-01-418-9996
NSN 6610-01-306-8530
NSN 6620-00-233-6839
NSN 5835-01-090-2844
NSN 6320-01-228-2380
NSN 2925-00-797-1042
NSN 6135-00-497-0491
NSN 5920-01-049-0022
NSN 6130-00-836-8063