G5/8 regulator inlet (G5/8 (BSP parallel)) vs Jg12: specs compared
Updated 05 September 2026.
6
specs differ
G5/8 regulator inlet (G5/8 (BSP parallel)) and Jg12 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.
| Spec | G5/8 regulator inlet (G5/8 (BSP parallel)) | Jg12 |
|---|---|---|
| Designation | G5/8 (BSP parallel) | 12 mm OD |
| Size / thread | G5/8 (5/8" BSP parallel) | 12 mm OD tube |
| Fitting form | parallel pipe thread, regulator side | push-fit collet, metric |
| Seals on | flat washer on the face of the inlet | single O-ring plus a stainless collet grab-ring |
| Rating / role | a common regulator inlet thread that a CGA-320 or W21.8 adapter presents | John Guest Speedfit metric fittings for 12mm OD tube |
| Tube OD | 12 mm |
Questions and answers
How do G5/8 regulator inlet (G5/8 (BSP parallel)) and Jg12 compare?
G5/8 regulator inlet (G5/8 (BSP parallel)) and Jg12 differ on 6 specs: designation, size / thread, fitting form, seals on, rating / role, tube od.