Iron Forging Companies
| Oasis Supply & Trade Llc (Oklahoma City, OK)
Primarily Serving: Edmond, OK - Norman, OK - Lawton, OK - Cleveland, OK |
| O'Brien Steel Service Co (Peoria, IL)
Primarily Serving: Normal, IL - Bloomington, IL - Springfield, IL - Decatur, IL |
| Oceanic Ornamental Iron Work (North Bergen, NJ)
Primarily Serving: Union City, NJ - New York, NY - Jersey City, NJ - Passaic, NJ |
| Oden Enterprises (Wahoo, NE)
Primarily Serving: Lincoln, NE - Omaha, NE - Bellevue, NE - Council Bluffs, IA |
| Odin Forge (Pomona, CA)
Primarily Serving: Diamond Bar, CA - Upland, CA - Chino, CA - Chino Hills, CA |
| Oest Metalworks (Phoenix, AZ)
Primarily Serving: Glendale, AZ - Tempe, AZ - Peoria, AZ - Scottsdale, AZ |
| Ofab (Ocala, FL)
Primarily Serving: Gainesville, FL - Spring Hill, FL - Deltona, FL - Sanford, FL |
| Ohio Knife & Grinding Co (Akron, OH)
Primarily Serving: Cuyahoga Falls, OH - Canton, OH - Cleveland, OH - Lakewood, OH |
| Ohio Star Forge Co (Warren, OH)
Primarily Serving: Youngstown, OH - Cuyahoga Falls, OH - Akron, OH - Mentor, OH |
| Ohio Steel Trading Inc (Chagrin Falls, OH)
Primarily Serving: Cleveland, OH - Mentor, OH - Cuyahoga Falls, OH - Lakewood, OH |
| Oil City Tube Div (Oil City, PA)
Primarily Serving: Erie, PA - Youngstown, OH - Pittsburgh, PA - Mentor, OH |
| Oilfield Pipe & Supply Inc (Glen Allen, VA)
Primarily Serving: Richmond, VA - Newport News, VA - Burke, VA - Hampton, VA |
| Oklahoma Forge Inc (Tulsa, OK)
Primarily Serving: Broken Arrow, OK - Cleveland, OK - Canadian, OK - Edmond, OK |
| Olin De Forge Co (Rutland, VT)
Primarily Serving: Schenectady, NY - Albany, NY - Manchester, NH - Nashua, NH |
| Olympic Steel Co (Bedford, OH)
Primarily Serving: Cleveland, OH - Lakewood, OH - Cuyahoga Falls, OH - Akron, OH |
| Olympic Steel Co (Milford, CT)
Primarily Serving: Stratford, CT - West Haven, CT - Bridgeport, CT - New Haven, CT |
| On Spot of North America (North Vernon, IN)
Primarily Serving: Bloomington, IN - Louisville, KY - Indianapolis, IN - Cincinnati, OH |
| Oregon Metal Slitters (Portland, OR)
Primarily Serving: Beaverton, OR - Clackamas, OR - Vancouver, WA - Gresham, OR |
| Oregon Steel Division (Portland, OR)
Primarily Serving: Beaverton, OR - Clackamas, OR - Vancouver, WA - Gresham, OR |
| Orion Ornamental Iron Inc (North Hollywood, CA)
Primarily Serving: Burbank, CA - Glendale, CA - Los Angeles, CA - Santa Monica, CA |
| Orscheln Products Llc (Moberly, MO)
Primarily Serving: Columbia, MO - O Fallon, MO - Blue Springs, MO - Saint Peters, MO |
| Osm Tubular (Portland, OR)
Primarily Serving: Beaverton, OR - Clackamas, OR - Vancouver, WA - Gresham, OR |
| Overland Metals Inc (Saint Louis, MO)
Primarily Serving: Florissant, MO - Saint Charles, MO - Saint Peters, MO - O Fallon, MO |
| Owen Steel Co (New York, NY)
Primarily Serving: Union City, NJ - Jersey City, NJ - Brooklyn, NY - Bayonne, NJ |
| Owensdale Scrap & Recycling (Connellsville, PA)
Primarily Serving: Pittsburgh, PA - Youngstown, OH - Charles Town, WV - Canton, OH |
