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Aluminum Extrusion Tolerance
Unit System
Metric (mm)
Imperial (inch)
Specified Dimension (mm)
Circumscribing Circle
(perimeter of cross section)
Select an option
Over 250 mm (10 inches) In Diameter
Less Than 250mm (10 inches)
Is 75% or more metal for this dimension?
(If it is wall thickness, then YES. If it is diameter of a hollow tube, then NO.)
Select an option
YES
NO
Is enclosed space?
(Tube is enclosed space. U channel is not.)
Select an option
YES
NO
Is material 5xxx series?
(5052 will need looser tolerances)
Select an option
YES
NO
Lookup Tolerance
The form is deciphered from the following ANSI Standard.
