I was hesitant to recommend Loctite Blue until I looked at mine and a couple of others. They are metal-to-metal. The nuts are nestled in plastic as are the screws.
I noticed that on mine, there was nothing on the threads. On some other new ones, there was something that looked tan colored. I've seen a similar-looking compound on screws for new sanding pads. I assumed it was either lithium grease or something with which I was not familiar.
I am not a Loctite expert by any means. I have used Blue in the past when I knew I wanted to take something apart again and it holds well but allows removal without destruction. It also didn't allow "backing out" accidentally.
Tom