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 5930-01-044-6467
NSN 5920-01-381-2597
NSN 5905-01-089-0379
NSN 6645-00-171-9251
NSN 5999-01-594-1602
NSN 5935-01-580-5719
NSN 5895-00-180-5830
NSN 5999-01-539-2067
NSN 5998-01-112-9679
NSN 5905-01-411-6782
NSN 6645-01-558-6229
NSN 5925-01-019-9703