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 
Brazil 
Spain 
Singapore 
Belgium 
Canada 
France 
Portugal 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5935-00-016-3491
NSN 6620-01-412-3258
NSN 4140-00-099-9205
NSN 6685-01-018-1360
NSN 6320-01-284-4508
NSN 6130-01-395-4117
NSN 5905-01-206-1505
NSN 5905-01-233-5094
NSN 5935-00-018-7343
NSN 5855-01-417-1315
NSN 5895-00-155-4578
NSN 6135-01-159-3032