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 5998-01-651-7656
NSN 5835-00-678-6981
NSN 6685-00-779-0774
NSN 5905-01-340-5647
NSN 5990-00-150-6979
NSN 6240-01-384-8802
NSN 6105-00-801-6335
NSN 5950-00-666-1887
NSN 2925-01-493-8045
NSN 5960-01-583-4737
NSN 6620-01-541-1561
NSN 6610-01-033-0139