I have been using a massive 12-14mm Kong swivel to attach my anchor
to the chain. The swivel is useful, but I really wanted a strong attachment to my anchor
, since no shackle which I was able to find at the time which would fit through my bow roller was strong enough.
Well, as it turns out, the big Kong swivel (weighing 2.4kg!) also doesn't go through my bow roller very well. It jams on my forestay pin. I'm tired of this and decided to change it.
So I bought the next size down of Kong swivel, which has SWL of 2000kg, the same as my chain. But this one will break if a side force of 2000kg is applied. So I decided to try to put a shackle between the swivel and the anchor. Now there are some new super-strong Wichard shackles which look like they might do the business. A 12mm one has breaking load -- according to the mfr -- of 10,000 kg, more than my chain.
But this one has a protruding pin, and I'm afraid it might catch on my bow roller again. The flush pin type (allen key head) in 12mm has SWL of 2100kg and breaking strength of 6000kg.
What do you guys think?