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 5990-00-382-5885
NSN 6240-01-501-5688
NSN 6685-00-489-5746
NSN 5905-00-260-5008
NSN 5945-01-645-4780
NSN 5930-01-351-8583
NSN 6105-01-467-2990
NSN 5975-01-494-1993
NSN 5945-01-347-5808
NSN 5985-00-723-5235
NSN 6650-01-200-3293
NSN 5925-01-358-7316