Odd deck hardware

[team karst]

Another item in spares. Google view not much help. Could be part of a genniker system.
Seems big just to swivel. Just under 6” long.

[Jammer]

Looks like a fuse.

[team karst]

I think so also. But not a mark on it. No part no., no load rating, no vendor. I hesitate to put on my spin halyard; a fuse deployment would be exiting.
Maybe for the sheet? But then u have a hunk of metal flogging��

[Jammer]

More often they would be used for the vang, so that they blow if someone leaves the vang on and eases the mainsheet.

[stormalong]

Looks like it would be easy to take apart. Why not take a look.

[MicHughV]

never seen or heard of such a device ???

looks much like a fancy swivel to my tired 'ole eyes..

odd that is has different sized shackles on either end ??

[wholybee]

7 minutes in, a similar fuse is demonstrated on a main sheet.

https://www.youtube.com/watch?v=dcYwwinFO4U

[MicHughV]

well, dang, learned something new today