Standard Specification for
Aluminum and Aluminum-Alloy Extruded Round Tubes for
This standard is issued under the fixed designation B 491/B 491M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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