A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The length must exceed 25 percent of the outside diameter or distance across peripheral flats. (when the length, outside diameter, and/or distance across peripheral flats are designated as a tolerance, the maximum dimension will be used to determine compliance.) it must have one or more internal steps (counterbores) and/or external steps on either or both bearing surfaces. Excludes spacer, optical element. See also washer, recessed and washer, shouldered and recessed.
Classification: Articles of aluminum nesoi
NSN 6650-00-133-7884
NSN 5835-01-447-2544
NSN 5895-00-235-8510
NSN 4140-01-256-4597
NSN 6240-00-612-0883
NSN 5930-01-313-1856
NSN 5965-00-173-4440
NSN 6320-01-525-4789
NSN 5925-01-047-1469
NSN 2925-01-376-9236
NSN 6145-01-430-2784
NSN 6135-01-608-9403