Cga326 vs Din477 6: specs compared
Updated 05 September 2026.
5
specs differ
Cga326 and Din477 6 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.
| Spec | Cga326 | Din477 6 |
|---|---|---|
| Designation | 0.825"-14 NGO RH, round seat | W21.8 x 1/14" RH |
| Size / thread | 0.825"-14 NGO right hand, external, large round nipple | W21.8 x 1/14" (21.8 mm, 14 TPI) right hand, external |
| Fitting form | cylinder valve outlet nut, round seat | cylinder valve outlet nut, external |
| Seals on | washer against a round nipple seat | captive O-ring or washer in the nut against the valve outlet |
| Rating / role | the nitrous oxide cylinder connection; shares the thread of CGA-320 but not the seat | the German DIN 477 designation for the European CO2 outlet, the same physical thread as W21.8 and BS 341 No.8 |
Questions and answers
How do Cga326 and Din477 6 compare?
Cga326 and Din477 6 differ on 5 specs: designation, size / thread, fitting form, seals on, rating / role.