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 2925-00-246-3077
NSN 5930-01-433-3375
NSN 5998-01-298-6833
NSN 6610-01-549-4960
NSN 5895-00-149-7905
NSN 6110-00-230-4509
NSN 6645-00-829-8868
NSN 5960-00-104-8456
NSN 5996-01-130-5128
NSN 6105-01-139-4066
NSN 5895-00-768-2842
NSN 6645-01-311-5481