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 5910-00-835-2370
NSN 5835-01-258-5597
NSN 5915-00-541-5589
NSN 5930-01-634-0659
NSN 5985-00-394-5888
NSN 6135-01-561-5945
NSN 6220-01-623-0048
NSN 5975-00-022-1307
NSN 6320-00-905-0543
NSN 5910-01-093-7034
NSN 5910-00-053-8655
NSN 5855-01-383-6860