| Business | Phone |
| Jin A Welding 8556 Edgeworth Dr, Capitol Heights 20743 | (301) 324-0227 |
| Lee Welding Co 1227 Marblewood Ave, Capitol Heights 20743 | (301) 925-7800 |
| Ornametals Inc 1400 Marblewood Ave, Capitol Heights 20743 | (301) 925-2700 |
| Professional Mechanical Svc 9100 Edgeworth Dr, Capitol Heights 20743 | (301) 333-3618 |
| Chung's Welding 1414 Ritchie Marlboro Rd # A1, Capitol Heights 20743 | (301) 808-0877 |
| H & H Machine Co 5916 Walker Mill Rd, Capitol Heights 20743 | (301) 736-6886 |