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 
Thailand 
Italy 
Turkey Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5975-01-541-6251
NSN 5998-01-564-5092
NSN 5915-01-300-3401
NSN 5960-01-150-2809
NSN 6130-01-255-8692
NSN 6105-00-665-8581
NSN 5950-01-393-8746
NSN 6320-01-052-2118
NSN 6105-01-631-1509
NSN 5910-01-403-2812
NSN 6620-00-770-0989
NSN 6110-01-105-2971