Post Cornelius PIN vs DUO QD Liq8: specs compared
Updated 05 September 2026.
5
specs differ
Post Cornelius PIN and DUO QD Liq8 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Post Cornelius PIN | DUO QD Liq8 |
|---|---|---|
| Designation | 19/32"-18 UNF (both posts) | black QD, 8mm push-in tail |
| Size / thread | 19/32"-18 UNF (about 15.1 mm major), gas and liquid the same | snaps over the liquid post; integrated 8mm push-in tail |
| Fitting form | UNF male post thread | snap-on liquid QD with integrated push-in |
| Seals on | poppet inside the post; post base O-ring seals to the keg lid | O-ring over the post shoulder; 8mm push-in O-rings on the tube |
| Rating / role | Cornelius pin-lock corny kegs; the disconnect locates on pins, not the thread | the liquid-side ball-lock disconnect with a built-in 8mm Duotight |
Questions and answers
How do Post Cornelius PIN and DUO QD Liq8 compare?
Post Cornelius PIN and DUO QD Liq8 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.