MFL vs Mini CO2 regulator (cartridge) (5/8-18 inlet: specs compared
Updated 05 September 2026.
5
specs differ
MFL and Mini CO2 regulator (cartridge) (5/8-18 inlet differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | MFL | Mini CO2 regulator (cartridge) (5/8-18 inlet |
|---|---|---|
| Designation | 1/4" MFL (7/16"-20 UNF) | 5/8-18 inlet, 1/4" MFL out |
| Size / thread | 7/16"-20 UNF male thread, 45 degree flare seat | 5/8-18 UNF inlet for a 74g threaded cartridge; 1/4" MFL (7/16-20 UNF) or 1/4" FFL outlet |
| Fitting form | SAE 45 degree flare, male | compact cartridge-fed CO2 regulator |
| Seals on | metal 45 degree flare face, never PTFE tape | cartridge seat at the inlet; flare face at the outlet |
| Rating / role | the homebrew flare standard on regulators, manifolds and disconnect tails | a small regulator that runs off a 74g threaded CO2 cartridge instead of a full tank |
Questions and answers
How do MFL and Mini CO2 regulator (cartridge) (5/8-18 inlet compare?
MFL and Mini CO2 regulator (cartridge) (5/8-18 inlet differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.