| Business | Phone |
| Parker & Harper Mfg Co 119 Dewey St, Worcester 1610 | (508) 757-5621 |
| Indiana Screw Mach Products 383 Shrewsbury St, Worcester 1604 | (508) 752-7561 |
| United Screw Mach Products Inc 383 Shrewsbury St, Worcester 1604 | (508) 754-7295 |
| G & R Screw Machine Prods Inc 770 Salisbury St # 512, Worcester 1609 | (508) 892-1911 |