| Business | Phone |
| Aeroserv Inc 4028 Binion Way, Mason 45040 | (513) 336-7200 |
| Carter Scott-Browne 4220 State Route 42, Mason 45040 | (513) 398-3970 |
| Hagan Precision 4457 Bethany Rd # B # 6, Mason 45040 | (513) 336-9817 |
| Hi-Tek Manufacturing Inc 6050 Hi Tek Ct, Mason 45040 | (513) 459-1094 |
| K & K Precision Inc 4457 Bethany Rd # B, Mason 45040 | (513) 336-0032 |
| Special Machined Components 7626 Easy St, Mason 45040 | (513) 459-1113 |
| Wray Precision Products Inc 4457 Bethany Rd # 100, Mason 45040 | (513) 336-8630 |