FITTING, ADAPTER, 3/8" NPT MALE, BRASS, FOR MECH. TEMP. GAUGE

It would be recommended to use the radiator hose fitting adapter kit. It comes in different sizes.

37/64" Drill 3/8" NPT Tap

M16 female in and 3/8 npt out, maybe I didn't word it properly

https://www.autometer.com/mechanical-temperature-5-8-18-unf-to-m16x1-5.html Thank you for your inquiry. The 2263 is not 3/8" NPT. See the 2275 linked above for a M16X1.5 adapter.

Thank you for your question. We do not have vehicle specific installation information. This fitting will adapt our mechanical water temp gauge to a 3/8" NPT threaded hole. If you have a port on your application that 3/8" NPT, this is certainly the correct adapter for you.

I can't remember exactly, but the fitting itself is 3/8 so the sensor I believe is 5/16.

Hi Mason, we have no specific information on your 1jz gte, but if it's similar in size to this 3-3/8" NPT, it's more likely an M16 x 1.5 thread, which was very common on Toyota models. The M16 x 1.5 adapter for our mechanical gauge would be model 2275.

Hi Kevo, thank you so much for contacting us. The port on an LS cylinder head is an M12 x 1.5 thread. You can use this adapter to install an electronic gauge: https://www.autometer.com/electric-temperature-or-pressure-1-8-npt-to-m12x1-5.html An air core gauge (short sweep electronic) will also require the 2259 shallow depth sending unit: https://www.autometer.com/shallow-depth-electric-temperature-sender-250-300-and-340-deg.html There is no way to use a mechanical temperature gauge with the existing port on an LS derived cylinder head without expanding the port. You'd have to use a radiator hose adapter for a mechanical temp gauge: https://www.autometer.com/catalogsearch/result/?q=radiator+hose#1&profile=products Hope this helps!