Beernut vs W218: specs compared
Updated 05 September 2026.
5
specs differ
Beernut and W218 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Beernut | W218 |
|---|---|---|
| Designation | 7/8"-14 (1" hex) | W21.8-14 (DIN 477 / BS 341 No.8) |
| Size / thread | 7/8"-14 straight thread, 1 inch hex across flats | W21.8 x 1/14" (22 mm, 14 TPI) |
| Fitting form | internally threaded hex coupling nut | cylinder valve outlet nut, external |
| Seals on | compresses a rubber washer between the tailpiece and the shank end | captive O-ring or washer in the nut against the valve outlet |
| Rating / role | the US beer industry standard nut that secures a tailpiece to the back of a shank | the European, UK, Oceania and Asian CO2 cylinder connection |
Questions and answers
How do Beernut and W218 compare?
Beernut and W218 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.