5ktq oxygen sensor threads

[Tom Leppke-Hennig]

The threads for the single wire universal sensor is M18-2.5 When I was
into 8V VW motors, I needed one of these taps for installing the oldy but 
goody manifolds onto the newer Lambda cars. Expensive little bugger. Had
to special-order it from a machine supply company.

I have never known an oxygen sonsor to have a different thread, even the
wide-band technology sensors used on real air-fuel ratio meters.

Tom LH