ordered bunch of those from web shop

which is the default fitting for those sensors? weldable with sensor support or one with 1/8 npt thread?

once ordered I got them with 1/8 npt, other time weld to manifold stuff with sensor support that it could be extented deeper into exhaust.

I need most with 1/8 npt, but would like some additional ones which can be welded directly, no problem to pay for it. (you get some extra, don't have to pay for it).