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 5930-01-654-2046
NSN 7035-01-350-4247
NSN 6145-01-495-0869
NSN 6645-00-435-5610
NSN 5925-01-398-0517
NSN 6135-01-617-0253
NSN 6610-01-034-5226
NSN 6220-01-042-9773
NSN 6145-01-506-4467
NSN 5935-01-183-7129
NSN 6150-00-313-5164
NSN 6220-00-828-9843