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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5895-00-434-9921
NSN 5915-01-167-8174
NSN 5930-01-488-2503
NSN 6610-00-278-7647
NSN 5985-01-241-8742
NSN 6220-00-269-8396
NSN 6130-00-133-3521
NSN 6645-01-626-9782
NSN 5999-01-257-8314
NSN 5996-01-501-0827
NSN 5915-01-654-8965
NSN 6650-01-505-1127