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 5920-01-551-5650
NSN 6320-00-164-4087
NSN 5935-00-339-1021
NSN 6145-01-160-4043
NSN 6150-01-565-9390
NSN 5945-01-165-9172
NSN 5915-01-440-9298
NSN 7035-00-834-2090
NSN 5998-01-376-2257
NSN 5905-00-393-2757
NSN 6320-01-624-0193
NSN 6150-00-644-8745