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 5945-01-411-7503
NSN 6135-01-521-0378
NSN 5998-01-487-5885
NSN 6610-00-873-6461
NSN 6130-01-020-9004
NSN 5999-01-067-4958
NSN 5855-00-151-3853
NSN 6105-01-398-0814
NSN 7035-00-188-6674
NSN 6320-01-054-3046
NSN 6240-00-984-3354
NSN 5965-01-503-5755