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 Army 
Dept. of the Navy 
Brazil 
Spain 
Republic of Korea 
Portugal 
Italy 
Greece 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5920-01-086-7219
NSN 5990-01-024-9659
NSN 6650-01-596-3297
NSN 5935-00-584-4584
NSN 6135-00-284-1406
NSN 5855-01-290-3248
NSN 6685-00-458-8001
NSN 5930-00-272-1427
NSN 6645-00-062-4012
NSN 6685-01-027-0721
NSN 5985-01-023-1708
NSN 5930-01-068-0997