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 6105-00-073-4424
NSN 6620-00-941-3461
NSN 6150-01-131-7534
NSN 6135-00-297-8873
NSN 5999-01-068-0052
NSN 5930-01-186-5545
NSN 5835-00-378-1429
NSN 6645-01-049-6116
NSN 6650-01-006-3487
NSN 5855-01-325-9507
NSN 6150-01-200-8199
NSN 4140-00-802-8080