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 6610-01-442-3509
NSN 6145-01-235-3263
NSN 5999-01-465-9560
NSN 5915-01-492-5333
NSN 5930-01-014-0649
NSN 5960-00-059-7010
NSN 5975-00-389-6958
NSN 6610-01-415-1623
NSN 5920-01-477-2837
NSN 6145-01-254-5868
NSN 6240-01-197-8491
NSN 5855-01-614-0965