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: Other articles of iron or steel not wire nesoi
NSN 5935-01-531-5138
NSN 6110-01-503-0450
NSN 6150-01-531-2194
NSN 6320-01-371-3047
NSN 5895-01-521-3111
NSN 5950-01-407-7692
NSN 5998-01-634-0604
NSN 5910-01-326-3437
NSN 5998-01-123-5289
NSN 5935-01-195-8499
NSN 6650-00-155-7941
NSN 6220-01-632-6446