I've heard from several sources that the Treso are a tight fit, but supposedly this is a feature of the brand, rather than of the differing designation of the screw thread.
Now I've never owned Tresos so I'm just going based on what others tell me, but it seems likely as the 12X28 Stainless Uncle Mikes I found went in to my Uberti/Cimarron '58 Remington very easily & weren't tight at all.
Now I've never owned Tresos so I'm just going based on what others tell me, but it seems likely as the 12X28 Stainless Uncle Mikes I found went in to my Uberti/Cimarron '58 Remington very easily & weren't tight at all.