Radium 8AN Male to Female Fitting w/Inline 1/8" NPT Female Port

The NPT adapter fittings are black (excluding 14-0173 which is zinc-plated steel for strength purposes). 

NOTE: 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.