| Mason Corp (Birmingham, AL)
|
| 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)
|
| Mcx Inc (Klamath Falls, OR)
|
| Merridian Rail (Chicago Heights, IL)
|
| Met A Lum Fabricators Inc (Paramount, CA)
|
| Metal Container Corp (New Windsor, NY)
|
| Metal Specialist Inc (Austell, GA)
|
| Metal Tech (Gulfport, MS)
|
| Metric Metals (Anaheim, CA)
|
| Metro Industries Inc (Columbus, OH)
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| Midwest Metal Works (Omaha, NE)
|
| Mike Schicker Aluminum Inc (Crystal River, FL)
|
| Millennium Rail Inc (Zwolle, LA)
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| Mitsui Components Inc (Casa Grande, AZ)
|
| Molten Metal Systems Llc (Tuscumbia, AL)
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| Moore Metals (Newport News, VA)
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| Most Inc (San Antonio, TX)
|
| Mpb Alumafab Inc (Englewood, CO)
|
| Multi-Metals Fabricators (South Gate, CA)
|
