Firestone pin-lock keg post (gas 9/16"-18 vs GAS Shutoff: specs compared
Updated 05 September 2026.
5
specs differ
Firestone pin-lock keg post (gas 9/16"-18 and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Firestone pin-lock keg post (gas 9/16"-18 | GAS Shutoff |
|---|---|---|
| Designation | gas 9/16"-18, liquid 5/8"-18 | 1/4" MPT x 1/4" MFL |
| Size / thread | gas post 9/16"-18 UNF, liquid post 5/8"-18 UNF (different sizes) | 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 | UNF male post thread | quarter-turn ball shutoff |
| Seals on | poppet inside the post; post base O-ring seals to the keg lid | NPT end taped on the thread; MFL end on the flare face |
| Rating / role | Firestone, Challenger and Super Challenger pin-lock kegs | shuts a single gas line without touching the regulator; some carry a check valve too |
Questions and answers
How do Firestone pin-lock keg post (gas 9/16"-18 and GAS Shutoff compare?
Firestone pin-lock keg post (gas 9/16"-18 and GAS Shutoff differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.