| Mason Corp (Birmingham, AL)
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| Master Marine Prod & Altech (Ferndale, WA)
|
| Mattie's Custom Fabrication & (Fort Myers Beach, FL)
|
| Maxi-Seal Harness Systems (Grandview, MO)
|
| Mayo Welding & Fabricating Co (Royal Oak, MI)
|
| Mc Elroy Metal Inc (Lewisport, KY)
|
| Mc Stowe Engineering & Metal (East Bridgewater, MA)
|
| Mc-21 Inc (Carson City, NV)
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| Mcx Inc (Klamath Falls, OR)
|
| Merridian Rail (Chicago Heights, IL)
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| Met A Lum Fabricators Inc (Paramount, CA)
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| Metal Container Corp (New Windsor, NY)
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| Metal Specialist Inc (Austell, GA)
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| Metal Tech (Gulfport, MS)
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| Metric Metals (Anaheim, CA)
|
| Metro Industries Inc (Columbus, OH)
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| Midwest Metal Works (Omaha, NE)
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| Mike Schicker Aluminum Inc (Crystal River, FL)
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| Millennium Rail Inc (Zwolle, LA)
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| Mitsui Components Inc (Casa Grande, AZ)
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| Molten Metal Systems Llc (Tuscumbia, AL)
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Moore Metals (Newport News, VA)
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