Dear Avitt, thank you
I run the tap, and threads appear to be clean and fine
The thread that look compromise are the pusher threads
So far I haven't try the Loctite or epoxy.
I saw this FASTSTEEL®,
"FASTSTEEL® is a hard kneadable, steel-reinforced, epoxy putty adhesive sealant that mixes in just one minute to provide fast repairs to items made of ferrous and aluminum metals. it comes in a handy four-ounce "tootsie-roll" form with the curing agent encapsulated in the consistency eliminates drips and runs, providing "no mess" applications with no tools required for use."
Probably, I'll order some and try with some scrap metal and screws.
Thanks,
P