Ball-lock quick disconnect (ball-lock QD vs Cga326: specs compared
Updated 05 September 2026.
5
specs differ
Ball-lock quick disconnect (ball-lock QD and Cga326 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Ball-lock quick disconnect (ball-lock QD | Cga326 |
|---|---|---|
| Designation | ball-lock QD, MFL or barb tail | 0.825"-14 NGO RH, round seat |
| Size / thread | snaps over the corny post; tail is 1/4" MFL (7/16-20 UNF) or a 1/4"/5/16" barb | 0.825"-14 NGO right hand, external, large round nipple |
| Fitting form | snap-on quick disconnect | cylinder valve outlet nut, round seat |
| Seals on | O-ring seals over the post shoulder; the tail seals by flare or clamp | washer against a round nipple seat |
| Rating / role | the universal ball-lock keg connector; gas and liquid are keyed differently | the nitrous oxide cylinder connection; shares the thread of CGA-320 but not the seat |
Questions and answers
How do Ball-lock quick disconnect (ball-lock QD and Cga326 compare?
Ball-lock quick disconnect (ball-lock QD and Cga326 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.