Oil cooler nut size

[SrKegler]

I need to buy a socket for the nut that hold the two parts together. It's the nut on the pipe the oil filter spins onto. Looks like maybe 19,21mm but I cant get anything on it to measure.

 

[Redwidow]

You need a 24mm deep well socket. A 15/16" is very close also

 

[SrKegler]

Thanks, I was way off on my guesstimate.