GU Thread Adapter vs Jg12i: specs compared
Updated 05 September 2026.
6
specs differ
GU Thread Adapter and Jg12i differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | GU Thread Adapter | Jg12i |
|---|---|---|
| Designation | 13/16"-14 to 7/8"-14 | 1/2" (12.7 mm) OD |
| Size / thread | 1/2" BSP (13/16"-14) one end, 5/8" BSP (7/8"-14) the other | 1/2" (12.7 mm) OD tube |
| Fitting form | port thread adapter | push-fit collet, imperial |
| Seals on | flat washer on each threaded face | single O-ring plus a stainless collet grab-ring |
| Rating / role | converts the 1/2" BSP (13/16"-14) beer port some G and U couplers carry to the 5/8" BSP (7/8"-14) standard | John Guest Speedfit imperial fittings for 1/2 inch OD tube |
| Tube OD | 12.7 mm |
Questions and answers
How do GU Thread Adapter and Jg12i compare?
GU Thread Adapter and Jg12i differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.