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 5910-01-295-1208
NSN 6130-01-528-8300
NSN 5965-00-518-0958
NSN 6130-01-577-6863
NSN 2925-01-076-5219
NSN 6105-00-148-8279
NSN 5985-01-305-1878
NSN 6610-00-876-1914
NSN 5920-01-609-1803
NSN 5996-00-082-0320
NSN 5905-01-111-8424
NSN 5975-00-153-7971