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Tack shackle ?

Jan 22, 2008
Beneteau 323 Annapolis MD
My slip neighbor lost their tack to roller shackle or whatever was there. Can you tell us what is the tack fitting? I'm thinking twisted D with 5/16 pin, but would like to know for sure. Especially the Length or I.D. ?
Jan 22, 2008
Beneteau 323 Annapolis MD
I guess you looking for a Wichard twisted D shackle such as the ones form West Marine: WICHARD Stainless Steel Twisted D Shackles | West Marine

Boat model and a photo of the attachment points might help.
Well, this is posted under Catalina 310. The usual connection is a ring on the tack, and a hole in the drum. The boat is not here, which is why I am asking for the owner. I was depending on some owner being close to their 310 or have pics.
Oct 22, 2014
CAL 35 Cruiser Portland OR, moored EVERETT WA
You could also use a soft shackle.
Make your own for about $2. The cost of the dyneema line with 2-3 times the working load of a D shackle.

This one has an estimated 10,000 lb working load. Material cost $3.50.