| Business | Phone |
| Triple H Machine 312 Old Stone Bridge Rd, Goodlettsville 37072 | (615) 851-5020 |
| United Machine & Tool 215 Connell St, Goodlettsville 37072 | (615) 859-3090 |
| Highland Rim Machine Co 7208 Bethel Rd, Goodlettsville 37072 | (615) 643-1133 |
| Neely Precision 710 Space Park N, Goodlettsville 37072 | (615) 855-2727 |
| Metal Craft Inc 215 Connell St, Goodlettsville 37072 | (615) 859-0398 |
| Metalmasters Machine 6549 Lickton Pike, Goodlettsville 37072 | (615) 859-6670 |