0.454 inches minimum and 0.458 inches maximum overall length, 0.329 inches minimum and 0.343 inches maximum first left counterbore depth, 0.151 inches minimum and 0.192 inches maximum first right step width, 1.970 inches nominal second right step width, 1.971 inches maximum first right step outside diameter, positioning notch located on each side of od along the lg,0.260 in. min,0.280 in. max w special features

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.