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 5945-01-261-6141
NSN 6685-00-720-3525
NSN 5998-01-447-1158
NSN 5999-01-308-4122
NSN 7035-01-548-9579
NSN 5835-00-084-8695
NSN 5996-01-067-8303
NSN 5965-01-562-5830
NSN 4140-01-551-1125
NSN 5915-01-514-8689
NSN 6150-00-406-5883
NSN 6645-01-412-4233