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 Date of Report (Date of earliest event reported) 
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 July 20, 2010 
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| 
 Delaware 
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 1-6770 
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 25-0790410 
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 (State or other jurisdiction 
 of incorporation) 
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 (Commission  
File Number) 
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 (I.R.S. Employer  
Identification No.) 
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 8285 Tournament Drive, Suite 150 
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 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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| 
 ¨ 
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 Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) 
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| 
 ¨ 
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 Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 
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| 
 ¨ 
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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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 ¨ 
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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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| 
 10.1 
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 Credit Agreement, dated as of December 1, 2006, among the Company (as borrower), Lasalle Bank Midwest National Association (as agent), and certain lenders named therein. 
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 99.1 
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Press release, dated July 20, 2010 reporting second quarter 2010 earnings. | 
| 
 MUELLER INDUSTRIES, INC. 
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||
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 By: 
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 /S/Kent A. McKee 
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 Name: 
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 Kent A. McKee 
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 Title: 
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 Executive Vice President and 
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 Chief Financial Officer 
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||
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 Date: July 20, 2010 
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||
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    Exhibit No.    
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    Description    
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| 
 10.1 
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 Credit Agreement, dated as of December 1, 2006, among the Company (as borrower), Lasalle Bank Midwest National Association (as agent), and certain lenders named therein. 
 | 
| 99.1 | 
 Press release, dated July 20, 2010 reporting second quarter 2010 earnings. 
 |