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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6135-01-049-5980
NSN 4140-01-245-8135
NSN 6110-01-177-7483
NSN 6135-01-247-5660
NSN 5935-00-362-3873
NSN 6620-00-526-8996
NSN 5895-01-278-9975
NSN 5999-00-018-2286
NSN 6685-01-284-1602
NSN 5915-01-317-6885
NSN 5920-00-427-7267
NSN 5985-00-350-8317