| A & B Welding & Iron Works | 301-350-8444 | 401 Ritchie Rd | Capitol Heights | MD | 20743 |
| A Able Security Ironworks Inc | 301-772-3343 | 2305 51st Pl | Hyattsville | MD | 20781 |
| Ace Iron & Demolitio Inc | 301-336-4316 | 8556 Edgeworth Dr | Capitol Heights | MD | 20743 |
| Allstar Co Inc Souvnrs | 301-565-3010 | 9619 Evergreen St | Silver Spring | MD | 20901 |
| Ambassador Iron Works | 301-336-7180 | 1408 Ritchie Marlboro Rd | Capitol Heights | MD | 20743 |
| American Iron Works Inc | 301-277-8444 | 3201 Kenilworth Ave | Bladensburg | MD | 20710 |
| Americanacon & Iron Works Inc | 301-568-6696 | 8065 Cryden Way | District Heights | MD | 20747 |
| Anvil Iron Shop Inc | 301-277-4141 | 4506 Emerson St | Hyattsville | MD | 20781 |
| Bannerworks | 301-229-8822 | 6516 Bannockburn Dr | Bethesda | MD | 20817 |
| Beltway Iron Company | 301-735-4900 | 4333 Forestville Rd | District Heights | MD | 20747 |
| Blackwell B | 301-498-5277 | 9416 5th St N | Laurel | MD | 20723 |
| Bmd Welding & Fabrication | 301-739-5354 | 89 W Lee St | Hagerstown | MD | 21740 |
| City Iron Works Inc | 301-925-9510 | 1506 Marblewood Ave | Capitol Heights | MD | 20743 |
| Clinton Iron Works | 301-297-4800 | 7511 Comrce La | Clinton | MD | 20735 |
| Csm Ironworks | 301-645-6711 | 6399 Randall Dr | Hughesville | MD | 20637 |
| Dariron Works | 301-277-3685 | 4908-A 46th Ave | Hyattsville | MD | 20781 |
| Eagle Iron Works | 301-937-5244 | 11299 Old Baltimore Pike | Beltsville | MD | 20705 |
| Federal City Iron Ltd | 301-773-3016 | 1793 Olive St | Capitol Heights | MD | 20743 |
| Fredericktowne Ironcraft | 301-663-0077 | 522 E South St | Frederick | MD | 21701 |
| G & G Iron Works Inc | 301-336-2165 | 8515 Walker Mill Rd | Capitol Heights | MD | 20743 |
| Halac Ironworks | 301-985-1230 | 4700 Lawrence St | Hyattsville | MD | 20781 |
| Indian Head Iron Works | 301-934-1986 | 111 N Maple Ave | La Plata | MD | 20646 |
| International Flag Supply | 301-924-4732 | 3356 Tanterra Cir | Brookeville | MD | 20833 |
| J & J Iron Works Inc | 301-297-4646 | 5838 Kirby Rd | Clinton | MD | 20735 |
| J B Kline Landscaping | 301-774-6768 | 6720 Olney Laytonsville Rd | Laytonsville | MD | 20882 |
| Jarnel Crane Rentals | 301-733-0441 | 221 Rowland Ave | Hagerstown | MD | 21740 |
| M-B Products | 301-253-3323 | 9630 Watkins Rd | Gaithersburg | MD | 20882 |
| M-B Products | 301-854-6300 | 3714 Rt 94 | Woodbine | MD | 21797 |
| Merchant Metals-Northeast Reggion | 301-779-8300 | 5140 Lawrence Pl | Hyattsville | MD | 20781 |
| Missco | 301-773-6678 | 1787 Olive St | Capitol Heights | MD | 20743 |
| Petal Construction & Ironworks | 301-779-5600 | 4509 Oliver St | Riverdale | MD | 20737 |
| Precision Fabricators Inc | 301-864-9255 | 5026 46th Ave | Hyattsville | MD | 20781 |
| R & F Metals | 301-868-5603 | 7617 Poplar Hill Ln | Clinton | MD | 20735 |
| Railing Systems | 301-843-2118 | 4330 Chas Crosng Dr | White Plains | MD | 20695 |
| Records Welding | 301-762-9669 | 647-P Lofstrand Ln | Rockville | MD | 20850 |
| The Sign Shop | 301-946-6200 | 11244 Georgia Ave | Wheaton | MD | 20902 |
| Trigiani Iron Works | 301-937-6896 | 11607 Maryland Ave | Beltsville | MD | 20705 |
| United States Flag Service | 301-473-8141 | 5741 Elmer Derr Rd | Frederick | MD | 21703 |
| Wallys Iron Works Inc | 301-829-2393 | 17560 Frederick Rd | Mount Airy | MD | 21771 |
| Washington Stair & Iron | 301-621-7791 | 508 Digiulian Blvd | Glen Burnie | MD | 21061 |
| Young Steel & Fabrication | 301-568-0000 | 8411 Old Marlboro Pike | Upper Marlboro | MD | 20772 |
| Ysk Construction | 301-474-5975 | 8422 Ballew Ave | College Park | MD | 20740 |
