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 6645-01-170-5402
NSN 6220-00-334-7008
NSN 6145-01-627-7218
NSN 4140-00-869-7012
NSN 6135-01-353-3802
NSN 5905-00-073-1415
NSN 5945-01-156-7745
NSN 5945-00-040-7386
NSN 5915-00-269-4463
NSN 5905-00-103-4263
NSN 5910-01-543-0039
NSN 5930-01-260-2236