| | A-1 Alloys (National City, CA) Distributor | |
| | Alloy Metals and Tubes International (Houston, TX) | |
| | American Boa Inc. (Cumming, GA) Manufacturer | |
| | B & S Aircraft Alloys, Inc. (Syosset, NY) Distributor | |
| | Columbia Specialty Co. (Paramount, CA) Manufacturer | |
| | Davis Pipe (Blountville, TN) | |
| | Four Slide Products Inc. (Nazareth, PA) | |
| | G & J Steel & Tubing Inc. (Hillsborough, NJ) | |
| | Gibson Tube, Inc. (North Branch, NJ) Manufacturer | |
| | GREENVILLE TUBE COMPANY (Janesville, WI) Manufacturer | |
| | Illinois Steel Service, Inc. (Chicago, IL) | |
| | JFD Tube & Coil Products, Inc. (Hamden, CT) | |
| | K-Tube Corporation (Poway, CA) | |
| | Perforated Tubes, Inc. (Ada, MI) Manufacturer | |
| | Production Tube Cutting, Inc. (Dayton, OH) Contract Manufacturer | |
