| AHAmerican Heat Treating | Monroe | CT | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| APApplied Process INC. | Livonia | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| BTBluewater Thermal Solutions-rockford | Rockford | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Bodycote Thermal Processing INC | Huntington Park | CA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| CSCincinnati Steel Treating | Cincinnati | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| DTDowa Tht America INC | Bowling Green | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| DMDynamic Metal Treating, INC. | Canton | MI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| EHEuclid Heat Treat CO. | Euclid | OH | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Industrial Metal Finishing, INC. | Placentia | CA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| LSLone Star Heat Treating CO LTD | Houston | TX | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| MOMorgan Ohare INC | Addison | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| SSSun Steel Treating INC | South Lyon | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| SSSuper Steel Treating, INC. | Warren | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| TITc Industries | Crystal Lake | IL | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| TTThermal Treatment Center INC | Wickliffe | OH | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| WDWyman-gordon Dillon Sc | Dillon | SC | Fabricated Metal Product Manufacturing332510 | 100-499 | ◐ LIKELY ACTIVE |
| WIWoodworth INC. | Detroit | MI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| ABAltenloh, Brinck & CO. U.s., INC | Pioneer | OH | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| AWAp Westshore | Oshkosh | WI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| AAAstro Aluminum Treating CO. INC. | South Gate | CA | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| AHAtmosphere Heat Treating INC. | Wixom | MI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| AIAustemper INC | Clinton Township | MI | Fabricated Metal Product Manufacturing332811 | 1-19 | ◐ LIKELY ACTIVE |
| BABodycote Arlington | Arlington | TX | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| BMBraddock Metallurgical, INC. | Jacksonville | FL | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| CICmc Impact Metals | Pell City | AL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
Evans Heat Treating Company | Huntingdon Valley | PA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| FCFalls City Machine Technology | Louisville | KY | Fabricated Metal Product Manufacturing332439 | 1-19 | ◐ LIKELY ACTIVE |
| GMGestamp Mason | Mason | MI | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| HIHoneywell International INC - Plant 4 | Freeport | IL | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| HMHudapack Metal Treating INC | Elkhorn | WI | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| MTMidwest Thermal Vac Mtv Incorporated | Kenosha | WI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| MTMms Thermal Processing, LLC | Davenport | IA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| PTParker Trutec Mmi INC. | Sevierville | TN | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| PSProgressive Steel Treating, INC | Loves Park | IL | Fabricated Metal Product Manufacturing332618 | — | ◐ LIKELY ACTIVE |
| RPReliable Plating Works-13th Street | Milwaukee | WI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| SHState Heat Treating INC | Grand Rapids | MI | Textile Mills313312 | 20-99 | ◐ LIKELY ACTIVE |
| THTri-city Heat Treat CO | Rock Island | IL | Fabricated Metal Product Manufacturing332811 | 20-99 | ◐ LIKELY ACTIVE |
| THTrojan Heat Treat INC | Homer | MI | Fabricated Metal Product Manufacturing332811 | 500+ | ◐ LIKELY ACTIVE |
Turbocam INC | Dover | NH | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| VSValence Surface Technologies | Wichita | KS | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| VPVoestalpine Precision Strip LLC | Pleasant Prairie | WI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
Advanced Heat Treat CORP | Waterloo | IA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
Advanced Heat Treat CORP | Monroe | MI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
Advanced Heat Treat CORP. | Cullman | AL | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| AMAjax Metal Processing-cold | Warren | MI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| ABAmerican Brazing Division | Willoughby | OH | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| AMAmerican Metal Treating INC | High Point | NC | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| BTBluewater Thermal Solutions-chicago 2 | Northlake | IL | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| BMBombardier Motor Corporation of America | Andrews | NC | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| CMCaribe Metallurgical | Bayamon | PR | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |