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 6130-00-316-1867
NSN 5950-01-468-0948
NSN 5965-01-005-0341
NSN 6150-01-422-1127
NSN 5985-00-175-4854
NSN 6320-01-246-4390
NSN 5905-01-384-3577
NSN 6645-00-230-4396
NSN 6145-01-447-6846
NSN 4140-00-707-5963
NSN 5915-01-025-1362
NSN 6130-01-296-7459