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 
Spain 
Republic of Korea 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 7035-01-150-6303
NSN 5996-01-599-9867
NSN 5960-00-479-1737
NSN 5925-00-177-4654
NSN 5990-00-965-0495
NSN 5965-01-571-7009
NSN 5975-00-339-3313
NSN 6220-01-422-2585
NSN 6685-01-012-3657
NSN 5915-01-469-6236
NSN 6610-01-443-5291
NSN 5935-01-425-7526