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 5990-01-262-4068
NSN 6135-01-523-3198
NSN 6110-00-084-5371
NSN 6645-00-074-4580
NSN 6150-00-112-2458
NSN 5965-00-296-9994
NSN 5985-01-186-2405
NSN 6150-01-542-9313
NSN 6610-00-001-9683
NSN 5935-01-154-9190
NSN 6110-00-200-8465
NSN 5965-00-296-9994