Need help fast! Oil pressure gauge install trouble

[mdost03]

I used some teflon paste around my sender. I didn't have to force it on after tapping so I think I'm good. Was really weird though why the adaptor or the sender wouldn't screw into the stock threads.

Doesn't have to be super tight in there does it? Mine is pretty tight, but I could have kept going, but it's aluminum isn't it so you don't want to go TOO far in or wrench on it that hard?