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 7035-00-252-7467
NSN 6135-00-062-5080
NSN 5996-00-932-3796
NSN 6110-00-113-1415
NSN 6620-01-548-5082
NSN 6220-01-273-2015
NSN 6150-01-063-6483
NSN 2925-00-782-1498
NSN 5975-00-459-8902
NSN 5996-00-160-1772
NSN 5996-01-147-6054
NSN 6240-00-455-7640