Install any 1/8 or 3/8 NPT pressure or temperature sensor into a steel pipe. Bung is required to be welded onto a pipe or manifold. Banks precision made high-quality NPT weld-on bungs. Whether you are adding pressure/temperature sensors to your engine, injection nozzles, an EGT to your exhaust (or anything for that matter), these weld-in bungs are exactly what you need. Build out your custom system to fit your needs.Key Features: Thread: 3/8" and 1/8" NPT. Material: 6061-T6 Aluminum