Looking for a quality liquid filled gauge

JBurch said

Have you looked in McMasteer-Carr? There is a good chance they would have what you are looking for.

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I checked with McMaster Carr they can come up with a 1/4 " NPT thread but is rated at 390 Degrees.....
A special shout out to Valiant ......I am still looking & will take a look at Aeromotive. Thanks Texas Red