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 Army 
Dept. of the Navy 
Brazil 
Spain 
Republic of Korea 
Portugal 
Italy 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5990-01-393-4808
NSN 6145-01-450-9484
NSN 6150-01-173-3957
NSN 5925-00-646-3137
NSN 5930-01-601-0485
NSN 5996-00-525-1777
NSN 5925-01-401-5314
NSN 6645-01-255-0391
NSN 6610-01-438-4383
NSN 5855-01-519-2933
NSN 5998-01-390-7149
NSN 5999-00-225-8375