| Festo QST model | Thread | Tube OD |
|---|---|---|
| QST-1/8-4 | R1/8 | 4 mm |
| QST-1/8-6 | R1/8 | 6 mm |
| QST-1/8-8 | R1/8 | 8 mm |
| QST-1/4-4 | R1/4 | 4 mm |
| QST-1/4-6 | R1/4 | 6 mm |
| QST-1/4-8 | R1/4 | 8 mm |
| QST-1/4-10 | R1/4 | 10 mm |
| QST-3/8-8 | R3/8 | 8 mm |
| QST-3/8-10 | R3/8 | 10 mm |
| QST-3/8-12 | R3/8 | 12 mm |
| QST-1/2-12 | R1/2 | 12 mm |
| QST-1/2-16 | R1/2 | 16 mm |