| 
                 Date
      of Report (Date of earliest event reported) 
               | 
              
                 March
      24, 2010 
               | 
            

| 
                 Delaware 
               | 
              
                 1-6770 
               | 
              
                 25-0790410 
               | 
            
| 
                 (State
      or other jurisdiction of incorporation or organization) 
               | 
              
                 (Commission
      File Number) 
               | 
              
                 (I.R.S.
      Employer Identification No.) 
               | 
            
| 
                 8285
      Tournament Drive, Suite 150 
               | 
              |
| 
                 Memphis,
      Tennessee 
               | 
              
                 38125 
               | 
            
| 
                 (Address
      of principal executive offices) 
               | 
              
                 (Zip
      Code) 
               | 
            
| 
                 ¨ 
               | 
              
                 Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425) 
               | 
            
| 
                 ¨ 
               | 
              
                 Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12) 
               | 
            
| 
                 ¨ 
               | 
              
                 Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b)) 
               | 
            
| 
                 ¨ 
               | 
              
                 Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c)) 
               | 
            
| 
                 MUELLER
      INDUSTRIES, INC. 
               | 
            ||
| 
                 By: 
               | 
              
                 /S/
      Kent A.
      McKee 
               | 
            |
| 
                 Name: 
               | 
              
                 Kent
      A. McKee 
               | 
            |
| 
                 Title: 
               | 
              
                 Executive
      Vice President and 
                Chief
      Financial Officer 
               | 
            |
| 
                 Date:
      March 24, 2010 
               | 
              ||
| 
                 Exhibits 
               | 
              
                 Description 
               | 
              |||
| 
                 99.1 
               | 
              
                 Letter
      to Stockholders, Customers & Employees 
               | 
              |||