ITEM 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

On July 30, 2009, Mueller Industries, Inc. (the "Company"), upon the approval of its Board of Directors, amended and restated its Amended and Restated By-laws to provide that any corporate action to be taken by a vote of the Company's stockholders, other than the election of directors, shall be authorized by the affirmative vote of not less than a majority of the outstanding shares of the Company present in person or represented by proxy at a meeting and entitled to vote thereon. Previously, matters determined by a stockholder vote, other than the election of directors, required the affirmative vote of not less than a majority of the votes cast at a meeting by the stockholders present in person or by proxy and entitled to vote thereon.

The summary of changes to the by-laws set forth above is qualified in its entirety by reference to the full text of the Amended and Restated By-laws of the Company, a copy of which is attached to this report as Exhibit 3.1 and incorporated herein by reference.

ITEM 9.01 Financial Statements and Exhibits.

(d) Exhibits

3.1 Amended and Restated Bylaws of the Company, adopted and effective as of July 30, 2009.

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