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 6105-01-526-9356
NSN 5925-01-369-2816
NSN 5905-01-618-3213
NSN 5935-00-385-3635
NSN 5960-01-048-8228
NSN 5915-00-989-2939
NSN 5990-01-293-4817
NSN 5935-01-479-8125
NSN 2925-01-397-2495
NSN 5998-01-492-5461
NSN 5855-00-631-4565
NSN 2925-00-977-3311