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 5990-01-211-6136
NSN 4140-00-155-8012
NSN 6220-01-408-0339
NSN 6620-01-605-2590
NSN 5905-01-300-3683
NSN 6220-00-027-5303
NSN 6135-01-238-2878
NSN 6650-01-079-9838
NSN 6130-01-095-8820
NSN 6130-01-381-1001
NSN 6105-01-604-3435
NSN 6105-01-255-4028