O2 sensor thread size

[wurzel]

Just so you know,  in case you want a plug to replace the sensor, it's 12mm fine thread, 12 to 14mm long.

[Relevant11]

Where did you end up acquiring said plug in the end Wurzel?

[wurzel]

  I measured mine which are not fitted,as I was replacing with bolts.
The plugs are somewhere hurried in my shed now, I think...
If you need one I can make an attempt to find them.

[Relevant11]

Many thanks for the offer  but I’ve gone down the bolt route too, got a way to go yet , the old exhaust system  is off but I decided to strip suspension linkage whilst I was in there, all v reasonable with a fair amount of Suzuki grease still present !

[wurzel]

Bolt and copper washer,way to go.
Good news on the Suzuki grease, they must have been feeling generous when they put yours together...