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 5999-01-015-1129
NSN 5910-00-900-6287
NSN 5999-01-179-0704
NSN 4140-01-308-6651
NSN 6645-01-060-3627
NSN 4140-00-453-5753
NSN 5910-01-552-6266
NSN 5835-00-484-1529
NSN 6620-01-457-9476
NSN 5996-01-591-8882
NSN 5855-01-020-7982
NSN 5998-01-429-8566