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 6240-00-660-8849
NSN 6650-00-153-3155
NSN 5925-01-157-2209
NSN 5915-01-454-2075
NSN 5990-00-932-3070
NSN 6110-01-171-3268
NSN 5920-00-518-1847
NSN 6145-01-514-7305
NSN 5998-01-268-2857
NSN 6650-00-957-0714
NSN 2925-01-218-5556
NSN 5930-00-154-0347