I've been looking for a radiator hose insert to install temp sensors for efans. I need an 1.75" insert that will accept (2) 3/8" NPT temp sensors. Flex-a-lite makes one that accepts 1/4 NPT but not 3/8". Steiger sells one that accepts 3/8 NPT but it's only 1.5" diameter and only has one port. It's looking like I'm going to have to have one fabricated but thought I'd check here first.

 

How about using an adapter? Brass fittings are all over the place.

 

I would use the adapter but the sensors are bigger than the holes. I could drill and tap them but I'd prefer just to buy something that's ready to go.

 

Like THIS