fan thermo switch

my bike tends to run hot so i bought a thermo switch that turns on the fan sooner from KTMtwins.
2 questions;

its a brass piece threading into aluminium (right?), does anyone know the torque value, id hate to strip that one.

it comes with an O ring should i also use pipe dope as a safe guard?

Use some "teflon tape" instead of pipe dope,, install it oposite of the way it threads in, much neater, and if you ever have to un-install it, it will come off easy and not strip threads