
Frank Marine
It stops you losing the pin over the side. The bolt stays with the shackle body when you back it off, which matters on a rolling deck or at the bow where a dropped pin is gone for good. Slower to undo than a screw pin, though.
No. No working load limit is published for these, so treat them as rigging and connection hardware rather than rated lifting gear. Anything overhead, anything involving a snatch strap, and anything where a failure lands on a person needs gear with a certified rating stamped on it.
The narrow throat keeps the load pulling straight down the pin rather than side-loading it, which suits a single strop, chain or thimble. If you need to gather several lines together, a wider bow shape handles the spread far better than a Dee will.

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine
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