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 6130-01-197-7397
NSN 5950-01-388-3753
NSN 6620-01-232-0680
NSN 5895-01-382-3794
NSN 5996-01-293-9220
NSN 6620-01-214-7520
NSN 5915-01-396-8857
NSN 6135-01-268-7056
NSN 5965-01-533-7687
NSN 5895-00-145-2657
NSN 6645-00-296-8310
NSN 5990-01-133-0351