Hey Pete
I am a cheap, I mean frugal, sailor so IIWMB I would turn the D into a locking D.
With a Dremel, grind a vee into the side so that the thumb screw blade drops into a slot when it tightens past a certain point. That's how my small shackles of that size "lock."
Otherwise, put a drop of blue Loctite on it.
The backstay adjuster did not wear the bow shackle pin.
The PO put it on the backstay because it was worn from the anchor.
Besides being ugly it'll last your lifetime on the backstay. Otherwise, replace it with a new Wichard (or IIWMB a Wichard snap shackle w/ clevis instead of an eye.)
https://defender.com/en_us/catalogsearch/result/?q=wichard%20shackle
-Ken
I am a cheap, I mean frugal, sailor so IIWMB I would turn the D into a locking D.
With a Dremel, grind a vee into the side so that the thumb screw blade drops into a slot when it tightens past a certain point. That's how my small shackles of that size "lock."
Otherwise, put a drop of blue Loctite on it.
The backstay adjuster did not wear the bow shackle pin.
The PO put it on the backstay because it was worn from the anchor.
Besides being ugly it'll last your lifetime on the backstay. Otherwise, replace it with a new Wichard (or IIWMB a Wichard snap shackle w/ clevis instead of an eye.)
https://defender.com/en_us/catalogsearch/result/?q=wichard%20shackle
-Ken