cam chain adjuster plug

[jamak]

I know I saw a post about this on here, but I couldn't find it. Pardon the repetition.
What is the deal with this plug? What is it made out of? What I have appears to be metal, with some sort of hole in the middle. I can't make out an allen or torx head on it, and there is always a drop of oil hanging in the AM when I go to start it. It's hard to tell if it leaks all the time because of all the gunk on the motor, but you have to guess that it is.
I can't see this as being the source of my oil mystery, but it's making a mess of my pipes.
I tried to goop it with Permatex after I cleaned it off, but no go on that.
What's my best bet? Thanks.