G5/8 regulator inlet (G5/8 (BSP parallel)) vs GAS Shutoff: specs compared
Updated 05 September 2026.
5
specs differ
G5/8 regulator inlet (G5/8 (BSP parallel)) and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | G5/8 regulator inlet (G5/8 (BSP parallel)) | GAS Shutoff |
|---|---|---|
| Designation | G5/8 (BSP parallel) | 1/4" MPT x 1/4" MFL |
| Size / thread | G5/8 (5/8" BSP parallel) | 1/4" MPT (1/4-18 NPT) one end, 1/4" MFL (7/16-20 UNF) the other, often with a check valve |
| Fitting form | parallel pipe thread, regulator side | quarter-turn ball shutoff |
| Seals on | flat washer on the face of the inlet | NPT end taped on the thread; MFL end on the flare face |
| Rating / role | a common regulator inlet thread that a CGA-320 or W21.8 adapter presents | shuts a single gas line without touching the regulator; some carry a check valve too |
Questions and answers
How do G5/8 regulator inlet (G5/8 (BSP parallel)) and GAS Shutoff compare?
G5/8 regulator inlet (G5/8 (BSP parallel)) and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.