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 UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 
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 FORM 8-K 
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 CURRENT REPORT 
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 Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 
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 Date of Report (Date of earliest event reported): 
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 November 3, 2011 
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      MUELLER INDUSTRIES, INC.      
(Exact name of registrant as specified in its charter) 
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    Delaware    
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    1-6770    
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    25-0790410    
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 (State or other 
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 (Commission File 
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 (IRS Employer 
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 jurisdiction of 
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 Number) 
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 Identification No.) 
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 incorporation) 
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 8285 Tournament Drive Suite 150 
      Memphis, Tennessee       
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 38125 
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 (Address of principal executive offices) 
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 (Zip Code) 
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           Registrant’s telephone number, including area code: 
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 (901) 753-3200 
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 Not Applicable 
(Former name or former address, if changed since last report) 
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 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) 
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 Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 
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 Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) 
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 Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 
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 ·   
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 The By-laws no longer expressly provide for the Chairman of the Board or any Vice Chairman to be executive officers of the Company. 
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 The By-laws no longer expressly provide for the respective offices of President and Chief Operating Officer. 
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 MUELLER INDUSTRIES, INC. 
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 By: 
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/s/Gary C. Wilkerson | 
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 Name: 
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 Gary C. Wilkerson 
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 Title: 
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 Vice President, General Counsel and 
Secretary 
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 Date:  November 3, 2011 
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 Exhibit No. 
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 Description 
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 3.1 
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 Amended and Restated Bylaws of the Company, effective as of January 1, 2012. 
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 99.1 
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 Press Release, dated November 3, 2011. 
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