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 5835-01-459-8664
NSN 7035-01-377-0760
NSN 5895-01-054-3799
NSN 6620-00-169-1609
NSN 6620-01-145-0271
NSN 6620-01-535-1230
NSN 5960-00-244-8044
NSN 6610-01-442-3509
NSN 5915-01-422-2014
NSN 6610-01-149-9749
NSN 5910-00-223-9826
NSN 5998-00-462-2380