| 3S Superior Sealing Services | 501 |
| ABC Company | 1234 |
| AD Tubi | 104 |
| Aerogo | 105 |
| Alabama Heat Exchanger | 1008 |
| Alleima | 500 |
| Ascent Tubular Product | 1007 |
| Astro Arc Polysoude | 102 |
| Babcock Power Inc. | 301 |
| Bachiller | 1012 |
| Bendel Tank & Heat Exchanger | 905 |
| BK Corrosion | 108 |
| Brask Inc. | 504 |
| Centrifuge World | 1002 |
| CG Thermal | 1009 |
| Chem Fabrication | 801 |
| CleanCo Systems | 604 |
| Climax Portable | 1004 |
| Curtiss-Wright | 107 |
| Custofab | 603 |
| Delta T International | 405 |
| Dunn Heat Exchangers | 602 |
| Ecutec LLC | 1011 |
| EFCO | 101 |
| Elliott Tool Technologies | 305 |
| Equipment Group | 904 |
| Flexitallic | 203 |
| Forged Components | 1001 |
| FQE Chemicals | 103 |
| Gaskets Resources/Durlon Sealing Solutions | 205 |
| Gforce Scrap | 1002 |
| GMM Pfaudler | 304 |
| Gulf Coast Exchanger | 605 |
| Hahn & Clay | 105 |
| HC Thermal | 805 |
| Heat Transfer Tubular Products | 701 |
| Hytorc Industrial Bolting Systems | 106 |
| Integra Technologies | 112 |
| Koch | 401 |
| Master-Lee Energy Services | 1005 |
| Neotiss | 110 |
| Nippon Yakin | 1003 |
| Ohmstede | 403 |
| Omega Thermo products | 1010 |
| Partners Specialties Inc | 202 |
| Patriot Bolt & Supply | 802 |
| Plastocor | 901 |
| Shuttlelift | 1006 |
| Southern Heat Exchanger | 109 |
| Stainless Band | 404 |
| Stone Age Tools | 111 |
| Superior Plant Rentals | 402 |
| Synalloy Metals | 1007 |
| Taprogge | 505 |
| Teadit | 803 |
| Technoform Heat Transfer Solutions | 201 |
| Tex Fin Inc. | 204 |
| Thermal Engineering International | 301 |
| Thomas C. Wilson | 902 |
| Tritorc Pipeline Solutions | 108 |
| USA Industries | 601 |
| Vahterus | 302 |
| Ward Vessel | 804 |
| Webco Industries | 704 |