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 5996-00-755-2078
NSN 5999-01-378-5395
NSN 6110-00-064-7005
NSN 6620-00-780-7786
NSN 5998-01-400-1365
NSN 6240-01-267-1531
NSN 5996-01-141-6916
NSN 5950-01-010-1869
NSN 6620-01-508-1996
NSN 6150-01-274-7712
NSN 6130-01-203-9147
NSN 6645-01-578-1920