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 6105-01-017-2748
NSN 6685-00-138-2739
NSN 6320-00-853-1920
NSN 5915-00-543-9675
NSN 5999-00-350-4073
NSN 5975-00-179-4708
NSN 5895-01-651-2896
NSN 5910-01-324-2412
NSN 4140-01-604-9981
NSN 5999-01-543-1731
NSN 6645-00-171-9639
NSN 4140-01-608-7263