G'day Jaoquim,

Unfortunately as far as we're aware there isn't an adapter that will allow a stove that runs off isopro fuel, to run off LPG.  They're different gas types and have different distribution and fueling rates.
Adapters are generally only available for different fittings on different canisters of the SAME type of gas. Eg. Coleman cannisters are Propane.  BBQ or Larger gas cylinders are also propane.  Jetboil style cannisters are not propane.

G'day Brian,

Sorry mate, this adapter won't suit your needs, it is designed to convert newer stoves with a 3/8" BSP thread, to be used on older style Primus internal thread gas bottles. If you let us know what you're trying to do via return email, we can have a look at options for you and let you know.

G'day Tony, 

The adapter end is the same, regardless of which hose you choose as it's a standard BSP attachment.
The fine or coarse end relates to your stove connection, which you'll need double-check.
If the stove you have is one we stock I can physically check, but otherwise I wont be able to give you that answer sorry!

G'day Sean,

This adapter is designed for very old Primus stoves (20 years old) that ran from refillable gas cylinders with a primus internal thread on them. I think your stove might run off disposable propane cylinders like this Coleman one? If so, then this BOM to 3/8" BSP hose should do the trick, however as we don't sell the Swedish Primus it's hard to know for sure, so it would be worth checking compatibility.

G'day Johan,

We've not even come across an straight adapter for that sorry - only even seen that connection with a hose.
Speaking to one of the stove companies not to long ago, it has something to do with the pressure in an LPG cylinder and the rate of delivery, aswell as safety.
Usually any LPG connection will be via hose of 80-120cm.