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 5925-01-603-7738
NSN 5990-01-113-7238
NSN 5905-00-400-9109
NSN 6320-00-089-9426
NSN 5965-01-557-2862
NSN 6610-01-349-6333
NSN 6105-01-425-3632
NSN 5985-01-168-1664
NSN 5945-00-828-0337
NSN 5920-00-001-9100
NSN 6135-00-767-0331
NSN 5960-00-586-5292