Mike - I'm not an A&P but always used antiseize on my O-320E2D
Lycoming exhaust studs and small muffler bolts for 30 years without
any trouble with them loosening or backing out. Never even gave it a
thought.

I also used it on spark plugs (torquing to the low limit), Once I had
a little bit dribble over the end that required the plug to be removed
& washed to get it to fire.