Hello Campers I bought this Widesea Camping Stove and in the (Aliexpress) Description it said "European Standart" Fitting (which I suppose is the most common C100 / 500 Threaded Fitting but no matter what I do I cant get the gas to flow into the stove.

I even tried (Sketchy I Know) taking each of the sealing rings separte out but one time the Gas did leave the canister (Slowly as i threadet it on very carefully)

So my question: Are there different "depths" of the same diameter threaded fitting?

The stove does really feel sturdy and well made so im reslly confused and I really want to use this stove and not return it.

Thanks