Ball-lock quick disconnect (ball-lock QD vs Beer shank (7/8-14: specs compared
Updated 05 September 2026.
5
specs differ
Ball-lock quick disconnect (ball-lock QD and Beer shank (7/8-14 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Ball-lock quick disconnect (ball-lock QD | Beer shank (7/8-14 |
|---|---|---|
| Designation | ball-lock QD, MFL or barb tail | 7/8"-14 ends, 3/16" bore |
| Size / thread | snaps over the corny post; tail is 1/4" MFL (7/16-20 UNF) or a 1/4"/5/16" barb | 7/8-14 thread on each end; internal bore commonly 3/16" or 1/4" |
| Fitting form | snap-on quick disconnect | through-wall beer shank |
| Seals on | O-ring seals over the post shoulder; the tail seals by flare or clamp | beer nut and washer at the back, faucet coupling nut at the front |
| Rating / role | the universal ball-lock keg connector; gas and liquid are keyed differently | the tube that carries beer through a kegerator wall or draft tower, faucet on the front, tailpiece on the back |
Questions and answers
How do Ball-lock quick disconnect (ball-lock QD and Beer shank (7/8-14 compare?
Ball-lock quick disconnect (ball-lock QD and Beer shank (7/8-14 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.