CZ 550 tenon diameter & thread?

[Hogpatrol]

Considering building a rifle off of a CZ 550 long magnum action. My question concerns tenon diameter, length and whether the threads are metric or English.

 

[Wyatt Smith]

We were just discussing CZ barrel threads on another thread here. “500 Jeffrey action options” is the thread title. Hope it helps.

 

[Hunter4752001]

I haven't measured one, but from what I've read it's a metric M28x2 thread. Note: The standard length action will have a smaller thread.

 

[GuttormG]

M28x2

 

[GuttormG]

And the std 550 is M26x2.
I am sure I have dimensioned sketches for both but where?
However, better measure your action or take-off barrel, there might be variants.