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 5965-01-196-1526
NSN 5960-01-157-4509
NSN 6220-01-579-0349
NSN 5965-01-238-9287
NSN 5930-00-445-6328
NSN 6620-01-020-4526
NSN 5930-00-466-9809
NSN 5999-01-026-9182
NSN 5996-01-440-4302
NSN 5950-01-533-6700
NSN 6685-01-452-9483
NSN 5915-00-271-2321