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 5925-01-361-8836
NSN 5950-01-624-0280
NSN 6110-01-487-4532
NSN 5975-01-406-7952
NSN 5999-00-015-4346
NSN 6645-00-673-0337
NSN 6320-00-149-7570
NSN 5945-01-423-7508
NSN 6620-01-649-9948
NSN 6320-01-521-1764
NSN 5965-01-231-0261
NSN 6145-01-065-0799