| Business | Phone |
| Madden Bolt Corp 13420 Hempstead Rd, Houston 77040 | (713) 939-9999 |
| Non-Ferrous Threaded Products 3309 Cherry St, Houston 77026 | (713) 224-4538 |
| American Anchor Bolt Mfg 13913 Buxley St, Houston 77045 | (713) 433-6099 |
| Atlas Bolt & Screw 6722 Northwinds Dr, Houston 77041 | (713) 937-6599 |
| Auge Industrial Fasteners 2030 Afton St, Houston 77055 | (713) 956-1700 |
| Houston Bolt & Gasket 4747 S Pinemont Dr 200, Houston 77041 | (713) 934-7150 |
| Dan-Loc Bolt & Gasket Inc 725 N Drennan St, Houston 77003 | (713) 356-3500 |
| Eastwood Manufacturing 6825 Breen Dr, Houston 77086 | (281) 447-0081 |
| Ella Screw Products 1717 W 23rd St, Houston 77008 | (713) 864-6040 |
| Fastener Manufacturing Co 1401 Lathrop St, Houston 77020 | (713) 672-9401 |
| Flexitallic Group Inc 450 Gears Rd # 790, Houston 77067 | (281) 604-2400 |
| Lone Star Fastners Lp 9009 North Loop E, Houston 77029 | (713) 675-5281 |
| Highland Threads Inc 11700 Gloger St, Houston 77039 | (281) 986-5100 |