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 6685-01-433-1567
NSN 4140-00-408-9989
NSN 5910-00-449-3333
NSN 5895-01-049-8525
NSN 6620-00-811-7614
NSN 6645-00-704-3630
NSN 5960-01-084-7381
NSN 6105-00-458-2987
NSN 6130-01-500-5542
NSN 6130-01-063-7446
NSN 6650-01-531-6738
NSN 5920-01-503-7235