Bs341 8 vs Beer shank (7/8-14: specs compared
Updated 05 September 2026.
5
specs differ
Bs341 8 and Beer shank (7/8-14 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Bs341 8 | Beer shank (7/8-14 |
|---|---|---|
| Designation | W21.8 (British designation) | 7/8"-14 ends, 3/16" bore |
| Size / thread | 21.8 mm x 14 TPI right hand, external (the W21.8 thread) | 7/8-14 thread on each end; internal bore commonly 3/16" or 1/4" |
| Fitting form | cylinder valve outlet nut, external | through-wall beer shank |
| Seals on | captive O-ring or washer in the nut against the valve outlet | beer nut and washer at the back, faucet coupling nut at the front |
| Rating / role | the British Standard 341 designation for the CO2 cylinder outlet used across the UK | 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 Bs341 8 and Beer shank (7/8-14 compare?
Bs341 8 and Beer shank (7/8-14 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.