Hi George,
My notes say they're M18x1.5 (but I don't have one in my hand to double check).
See also:
http://www.bosch.com.au/content/language1/downloads/sensors_oxygen.pdf
/jwc ['89 505S "10PARUE"]
> I have to clean the threads on the downpipe O2 sensor hole and need the > thread size, the sensor threads are too mangled to measure. > I Guess it is M16 X 1.5 but really don't know > Help > > > George Nunez Received on Mon Feb 18 10:51:31 2008