NPT (National Pipe Thread) fittings seal by the intentional interference created by the tapered threads meshing together. See the additional images section for photos of each part number.

• The 14-0359 is commonly used with the popular Bosch PST-F1 absolute fluid pressure/temperature sensor. It is also compatible with the 2018+ Mustang GT fuel rail sensor
• Always use a small amount of PTFE paste or tape on NPT threads and tighten to finger tight, then add another 1.5 to 3 turns until tight