Originally Posted by amc49
Thinking there's some misunderstanding here. Despite all this talk of varied tapered or non-tapered threads the fact remains that car has either one or the other, the replacement fitting should have been the same type.
Seems like an odd way to design the parts, but the fact is that it seals with the correct torque applied. The part numbers from the Ford parts site for my vin number, matched the parts I received, and it worked. May be why the adapter is made out of soft metal, while the sensor is made of hard steel. It allows the sensor to dig in to the adapter to seal it.