Hi Garulfo

Glomex / Shakespeare 390-1 Classic SSB mounting instructions state:
"1a. You must apply Loctite 242 thread locking compound to the Tip
Section’s ferrule threads and the Base Section’s upper ferrule
threads before assembly to ensure that the Tip Section remains
securely tightened while in service."
see here: https://shakespeare-ce.com/marine/product/390-1-ssb-antenna/

We installed ours about 3 yrs ago and no issues with loose threads.
--
Michael & Robyn

SY RIPPLE SM2K # 417
currently in CYB Cambridge MD USA