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 5996-01-443-6599
NSN 5990-00-838-1082
NSN 5925-01-106-0706
NSN 5915-00-345-8957
NSN 6620-01-224-0888
NSN 6220-01-658-4536
NSN 6620-01-196-7670
NSN 6220-01-023-0394
NSN 5985-00-904-7376
NSN 6645-01-166-3788
NSN 6610-00-906-3047
NSN 5910-00-368-4108