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 5985-00-491-9484
NSN 6620-00-851-1487
NSN 6685-00-079-0313
NSN 5905-00-854-3680
NSN 5855-01-147-4785
NSN 6150-01-448-3206
NSN 5985-01-334-6443
NSN 6650-01-014-5990
NSN 5855-01-210-3002
NSN 5950-01-010-3887
NSN 5950-01-559-2557
NSN 5920-00-579-8434