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 6240-00-156-1607
NSN 6620-00-929-1188
NSN 5835-00-908-8327
NSN 6650-01-319-6930
NSN 5935-01-418-1014
NSN 6620-01-422-7012
NSN 6685-01-346-5838
NSN 5960-01-632-6576
NSN 5975-01-661-2041
NSN 5999-00-583-6631
NSN 6650-01-629-9480
NSN 6145-00-847-6772