So this likely isn't that "weird".
The Stevens is the same as a Savage. "Remington" or more properly said Cerberus, has/had a few things with the same thread spec. Prior to Marlin selling out, the XL7 / X7 was a bolt action with a nut and the same thread spec as a small shank. Once they sold out, the Rem 783 "replaced" the XL7, but barrel wise it's the same animal.
So if one of their other former "economy" lines was the same, sans barrel nut, it isn't that difficult to check headspace and simply fit the barrel.

From the top O my head, I can't recall the Rem thread spec, but is also possible to re-thread an existing barrel for the Savage spec.

Cheers