Make sure each bolt is
finger-tight before tightening them all with a wrench.
The thumbscrew is spring-loaded and also has flats on it if you want to screw it down more than
finger-tight.
The jam nut was less than
finger-tight. There was no Loctite or self-locking mechanism, apparently by design.
So get into this habit: Make the connections at both ends of the supply line
finger-tight, then give them another one-eighth to one-quarter turn with pliers.
That's like
finger-tight plus a little twist of the wrench.
Then tighten the gland follower nuts
finger-tight to start.
There are many pieces to be bolted to each other and only
finger-tight. We begin to notice that there is not one picture that is just like our building; but that's okay, we smile at each other, still confident we can do this.