How to connect to this fitting?

[siricosm]

Here is a pic of a fitting on a duplex stainless buffer cylinder. The thread looks to be 1" BSPP.

Any idea of the best way to connect to this? Is there some kind of gasket/o-ring/olive meant for these? or is it best to use a tapered fitting with pipe with dope and hemp?

 

[Brambles]

Equivalent male thread with a bead of Loctite 577 on the second or third thread. It works first time every time

 

[siricosm]

Thanks, I might try that. I normally use hemp and pipe dope, but maybe it is time to try something more modern.