O2 sensor thread size M18x1.5 ??

[Brandon McCafferty]

Ok, I somehow was able to strip the threads on my header's O2 bung while
removing my bad sensor.

I was hoping the new sensor would "re-thread" the bung. Not happening. The
header is stainless and much stronger than the sensor threads. Now the new O2
sensor is missing half of it's threads because the O2 bung is stripped.

So I need to get a tap & die tomorrow to rethread the bung and new sensor, but
do not know the exact size. Is it M18x1.5

Any help would be appreciated.

Brandon
'96 G20