Oring part number / dimensions

[MC_PL]

Hi everyone,

I'm looking for the part number or dimensions for the o-ring in the AC system of my 2006 Expedition. Specifically, I need the o-ring that fits between the two lines marked with red circles in the attached picture.

Can anyone provide the correct o-ring part number or its dimensions?

Thanks in advance for your help!

 

[Hamfisted]

Do you have a digital caliper to measure the mating surface ? I think it's 9mm.
Should be this guy ..... Accumulator Oring on Gen2 Expy







.

 

[Fastcar]

Looking at the diagram it's 9.25 I think.