Depends....I believe they are colour coded. Yellow or green. Depending on which one you have its that size.
 
I believe its 5/8 unf certain this is the adaptor thats comes with the Tim 52mm gauge with capillary sender and it fitted straight into the 200 disco stat housing
I hope its the same in the def 200 as i have another gauge coming!


Lynall
 
If you wait until the end of the week i will try and confirm as it should be here this week hopefully!
But if you want to look its the Tim gauges on e bay


Lynall
 
Have orderd gauge and sensor from ETB gauges for about 31 quid plus vat, they say its 5/8 as well.Thanks.
 

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