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 5985-00-524-9656
NSN 5950-00-472-5661
NSN 5990-00-885-4020
NSN 6135-01-010-0891
NSN 6610-01-375-1527
NSN 6610-00-884-2824
NSN 5950-01-415-7819
NSN 5930-00-815-3531
NSN 5855-01-151-5541
NSN 5990-00-997-1382
NSN 6620-01-010-0518
NSN 6150-01-453-6503