| 1 | Spiral Metals | | USA |
| 2 | Berg Steel Pipe Corp. | | USA |
| 3 | Juniper Industries Inc. | | USA |
| 4 | Flexmaster Canada Ltd. | | USA |
| 5 | American Spiralweld Pipe Co. LLC | | USA |
| 6 | Midwest Spiro Pipe Co. Inc. | | USA |
| 7 | Naylor Pipe Co. | | USA |
| 8 | Chicago Metal Rolled Products Co. | | USA |
| 9 | Morris Coupling Co. | | USA |
| 10 | Metal Works Corp. | | USA |
| 11 | Reliable Source Inc. | | USA |
| 12 | Process Control Corp. | | USA |
| 13 | Marstan Inc. | | USA |
| 14 | The Tin Knockers Industrial | | USA |
| 15 | Baghouse & Industrial Sheet Metal Services Inc. | | USA |
| 16 | Sheet Metal Connectors | | USA |
| 17 | Fab-Rite Sheet Metal | | USA |
| 18 | Cen Fabrications Inc | | USA |
| 19 | Commercial Duct Systems LLC | | USA |
| 20 | WSM Industries | | USA |
| 21 | Lane Enterprises Inc. | | USA |
| 22 | Sewickley Construction Products Inc. | | USA |
| 23 | Albina Co. Inc. | | USA |
| 24 | Pena-Plas Co. | | USA |
| 25 | Monroe Metal Manufacturing Co. | | USA |
| 26 | Northern Air Sheet Metal | | USA |
| 27 | Streimer | | USA |
| 28 | Hercules Industries Inc. | | USA |
| 29 | Air Handling Systems | | USA |
| 30 | Chi Manufacturing | | USA |
| 31 | Stamped Fittings Inc | | USA |
