Jg10 vs Jg12: specs compared
Updated 05 September 2026.
12 mm
Jg12 wins on tube outer diameter
On tube outer diameter, Jg12 leads: 12 mm versus 10 mm.
| Spec | Jg10 | Jg12 |
|---|---|---|
| Designation | 10 mm OD | 12 mm OD |
| Size / thread | 10 mm OD tube | 12 mm OD tube |
| Fitting form | push-fit collet, metric | push-fit collet, metric |
| Seals on | single O-ring plus a stainless collet grab-ring | single O-ring plus a stainless collet grab-ring |
| Rating / role | John Guest Speedfit metric fittings for 10mm OD tube | John Guest Speedfit metric fittings for 12mm OD tube |
| Tube OD | 10 mm | 12 mm |
Questions and answers
Which has the higher tube outer diameter, Jg10 or Jg12?
On tube outer diameter, Jg12 leads: 12 mm versus 10 mm.
How do Jg10 and Jg12 compare?
On tube outer diameter, Jg12 leads: 12 mm versus 10 mm.