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 5925-00-926-8425
NSN 5965-01-107-8549
NSN 5915-00-132-3493
NSN 4140-00-195-1980
NSN 7035-00-631-3782
NSN 6610-00-170-6715
NSN 6240-01-532-7883
NSN 6620-01-633-8443
NSN 6240-01-330-2445
NSN 6685-01-627-6678
NSN 6110-01-631-4109
NSN 5999-00-416-9116