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 5915-01-501-5895
NSN 6105-01-142-6179
NSN 5990-00-359-9839
NSN 5945-01-147-9026
NSN 5985-01-487-0879
NSN 6650-00-403-6386
NSN 6650-01-481-8009
NSN 6240-01-633-9357
NSN 6685-01-469-1959
NSN 6650-01-261-5239
NSN 6240-01-263-0123
NSN 5950-01-487-3750