M22x1.5 to coolant sensor adapter? Options

[mikesmith]

Trying to fit a 3/8NPT or M12x1.5 coolant sensor into what I think is a standard M22x1.5 fan switch fitting (Renegade radiator), but having no luck locating an adaptor to suit either.

Anyone have a source? Or an alternate suggestion?

[mikesmith]

Thanks; the "ISO port" nomenclature is new so that helps with the searching.

I'm worried that, with the way that the port is located and the geometry of the GM sensor, I'll wind up with the active part of the sensor in an air pocket because it won't poke out far enough.

Ideally, I'd be able to find something like this:

http://www.sealconusa.com/reducer-nc-round-metric.html

with the right thread, but so far it looks like I'd be better off hoping the port is really M25...