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 5990-00-263-1289
NSN 6650-00-575-7487
NSN 6135-01-483-5269
NSN 5935-01-381-0824
NSN 5950-01-371-2095
NSN 5910-00-404-0287
NSN 6620-01-660-7873
NSN 5945-01-378-8164
NSN 6105-01-627-1071
NSN 6135-01-556-7318
NSN 6620-01-334-8938
NSN 6220-00-458-4633