1/350 Open Chocks

Drums, check this out, it might just be the ticket.

These are Shapeways 'Z' scale (1/220) chocks and bitts, and from the picture (theirs) the fittings look pretty close to what you are looking for. And, the price ain't too bad either.

Then, all you have to do is open the top of the chock.

What size ship aer you building?

DD open chocks are not the same a BB, CA, CL, etc.

Not that I'm seeing a lot of variety in AM for 1/350.

At 1/192, all sorts of options.  Sigh

The listed Shapeways products are scaled for destroyers, which are about 1/2 to 3/4th the size of those you need. So you might want to check on slightly larger scale (1/300 - 1/250) or maybe even 1/200 due to the fact you need them for a battleship.

There are a couple sets of closed chocks in 1/350 on Shapeways. Perhaps you can buy those and modify them to open?

https://www.shapeways.com/product/WU5Y2V72E/1-350-usn-reduced-rcs-bitts-and-chocks?optionId=168409653&li=marketplace

https://www.shapeways.com/product/5F7V85KJW/1-350-usn-chock-destroyer-set-x22?optionId=96341777&li=marketplace

Try making one or two and then make a mold and cast the rest with 5 minute epoxy. You'll probably need to cast them on their sides, and apply the epoxy with a pin, chasing out the bubbles in the process. Buff them with an emery board to round them. Just make sure you degrease them well before trying to CA them in place.

I made sets of bitts that way, and used soldering flux as a release agent.

Hey, it's an option !!!

There was a discussion about this befiore, in 1/700. Yep, cost seemed to be really high.

I'd proposed an idea to make them- not great but ok.