Steel Service Centers
| Master-Halco (El Paso, TX)
Primarily Serving: Las Cruces, NM - Albuquerque, NM - Rio Rancho, NM - Odessa, TX |
| Matex Wire Rope Co Inc (Kilgore, TX)
Primarily Serving: Longview, TX - Tyler, TX - Jefferson, TX - Shreveport, LA |
| Maverick Steel Enterprises (Houston, TX)
Primarily Serving: Pasadena, TX - Missouri City, TX - Sugar Land, TX - League City, TX |
| Max Industries (Gardena, CA)
Primarily Serving: Hawthorne, CA - Torrance, CA - Carson, CA - Compton, CA |
| Mazzella Lifting Technologies (Louisville, KY)
Primarily Serving: Lexington, KY - Bloomington, IN - Owensboro, KY - Cincinnati, OH |
| Mba Building Supplies (Gadsden, AL)
Primarily Serving: Birmingham, AL - Huntsville, AL - Decatur, AL - Tanner, AL |
| Mc Crone Metals Sales Inc (Pittsford, NY)
Primarily Serving: Rochester, NY - East Amherst, NY - Clay, NY - Buffalo, NY |
| Mc Cullough Aluminum Inc (Apopka, FL)
Primarily Serving: Sanford, FL - Orlando, FL - Deltona, FL - Kissimmee, FL |
| Mc Farland Steel Supply (Mattoon, IL)
Primarily Serving: Decatur, IL - Champaign, IL - Terre Haute, IN - Springfield, IL |
| Mc Junkin Corp (Columbus, OH)
Primarily Serving: Springfield, OH - Dayton, OH - Middletown, OH - Hamilton, OH |
| Mc Junkin Corp (Indiana, PA)
Primarily Serving: Pittsburgh, PA - Youngstown, OH - Erie, PA - Charles Town, WV |
| Mc Junkin Corp 27 (Crum Lynne, PA)
Primarily Serving: Philadelphia, PA - Camden, NJ - Wilmington, DE - Newark, DE |
| Mc Laughlin Metal Sales Co (Bridgeton, MO)
Primarily Serving: Saint Charles, MO - Florissant, MO - Saint Peters, MO - Saint Louis, MO |
| Mc Nichols-Tx (Dallas, TX)
Primarily Serving: Irving, TX - Mesquite, TX - Richardson, TX - Garland, TX |
| Melco Steel Inc (Kenner, LA)
Primarily Serving: Metairie, LA - New Orleans, LA - Baton Rouge, LA - Gulfport, MS |
| Metal & Vinyl Products (Fort Walton Beac, FL) |
| Metal Bars Inc (Santa Fe Springs, CA)
Primarily Serving: Norwalk, CA - Whittier, CA - Downey, CA - Pico Rivera, CA |
| Metal Casting Technology (Milford, NH)
Primarily Serving: Nashua, NH - Manchester, NH - Lowell, MA - Lawrence, MA |
| Metal Concepts Inc (Monticello, AR)
Primarily Serving: Pine Bluff, AR - Monroe, LA - Little Rock, AR - North Little Rock, AR |
| Metal Depot Inc (La Mirada, CA)
Primarily Serving: Buena Park, CA - Norwalk, CA - La Habra, CA - Whittier, CA |
| Metal Express (Chino, CA)
Primarily Serving: Chino Hills, CA - Ontario, CA - Pomona, CA - Yorba Linda, CA |
| Metal Express (Livonia, MI)
Primarily Serving: Westland, MI - Farmington, MI - Dearborn Heights, MI - Canton, MI |
| Metal Express (Villa Park, IL)
Primarily Serving: Wheaton, IL - Oak Park, IL - Des Plaines, IL - Cicero, IL |
| Metal Man (Miami, FL)
Primarily Serving: Miami Beach, FL - Hialeah, FL - North Miami Beach, FL - Hollywood, FL |
| Metal Miniatures (Wilmette, IL)
Primarily Serving: Evanston, IL - Skokie, IL - Des Plaines, IL - Mount Prospect, IL |
