Autometer Thermocouple Compress Fitting 1/4in / 1/8in NPTF Male w/Weld Boss

This kit gives you the parts to connect a thermocouple gauge to your engine. You get a 1/4 inch compression fitting that threads onto your thermocouple line, and it mates to a 1/8 inch NPT male thread. It also includes a weld-in bung with a 1/8 inch NPT female thread, so you can create a secure port on your exhaust or manifold for your temperature sensor.

Both fittings are made from high carbon steel, which is a strong material for this kind of application. The compression fitting is straightforward to use, just tighten it down on your thermocouple line. The weld boss gives you a solid mounting point for your sensor, and it's designed to be welded directly onto your exhaust system or other components where you need to measure temperature.