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 5835-01-017-3860
NSN 5925-00-529-3950
NSN 6145-01-634-0388
NSN 6220-00-337-7504
NSN 6685-01-014-5336
NSN 5999-01-453-2393
NSN 5990-01-160-6978
NSN 6620-00-620-3089
NSN 5855-01-308-0955
NSN 2925-00-132-1280
NSN 5960-01-424-1781
NSN 5910-01-446-6623