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 2925-00-301-0933
NSN 6685-00-186-9190
NSN 5930-00-084-1518
NSN 4140-01-288-4867
NSN 5895-01-263-8694
NSN 6620-01-640-6761
NSN 6685-00-582-1215
NSN 2925-00-465-6354
NSN 5999-00-637-9685
NSN 5960-01-350-5332
NSN 6610-00-583-1084
NSN 6130-00-909-6728