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 5990-01-200-3711
NSN 6610-01-583-6466
NSN 7035-01-129-7834
NSN 6110-01-570-0550
NSN 6645-01-271-0248
NSN 5930-00-947-6625
NSN 6240-01-658-3177
NSN 5965-00-518-0958
NSN 6320-01-359-3921
NSN 6150-01-395-0927
NSN 5920-00-960-0386
NSN 6130-01-527-1008