Thread Size Question: CVA Optima 50cal Breech Plug

[seabast]

Hi,

Could someone confirm the thread size of a CVA Optime 50cal breech plug?

I already did a search online, 9/16-18, but it seems larger. More like a 5/8"-18. Anyway, I won't do anything stupid.... just checking before doing.

Thanks in advance!

 

[guntech]

Regardless of what you find on the internet, when you remove it, go on what you measure.