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 5855-01-295-2313
NSN 6610-00-899-1751
NSN 6135-00-947-0406
NSN 5998-00-874-1062
NSN 6220-01-141-7709
NSN 6150-01-424-8062
NSN 6320-01-201-2776
NSN 5855-01-117-7207
NSN 5935-01-378-8038
NSN 6320-01-600-5808
NSN 5985-00-155-5991
NSN 6145-01-432-0088