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 5960-01-323-6432
NSN 4140-01-510-9605
NSN 5925-01-449-2188
NSN 6650-01-122-0169
NSN 6610-01-125-5761
NSN 6645-00-521-0353
NSN 6650-00-266-6808
NSN 5930-01-365-6928
NSN 6130-01-265-7225
NSN 5990-01-606-7521
NSN 6150-01-037-2030
NSN 6685-01-087-7347