| Business | Phone |
| Coat Of Armour Iron Works Co 1236 Mount Olivet Rd Ne, Washington 20002 | (202) 338-5076 |
| District Lock Security Systems 505 8th St Se, Washington 20003 | (202) 547-8236 |
| Northeast Iron Works Inc 2632 Douglas St Ne, Washington 20018 | (202) 529-9440 |