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 5950-00-819-5141
NSN 5960-01-368-5874
NSN 6130-00-387-2051
NSN 5895-01-633-8249
NSN 5985-00-807-5215
NSN 5950-01-204-4637
NSN 6620-01-291-7959
NSN 7035-00-731-8729
NSN 5985-01-387-6512
NSN 5998-00-881-5226
NSN 6610-01-374-0569
NSN 6105-00-260-6700