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 6105-00-213-9225
NSN 6135-01-215-1245
NSN 5905-01-389-7411
NSN 5965-00-208-4896
NSN 5935-01-389-8210
NSN 6320-01-573-3215
NSN 7035-01-633-9537
NSN 6145-01-165-7714
NSN 5930-01-022-8398
NSN 5910-01-060-9604
NSN 5950-01-619-2718
NSN 5999-01-032-2888