What are these portlight closures called?

[Markhunter1097]

As a result I have 10 bronze wing nuts, too many for spares..

[wsmurdoch]

You might try Chatfield Marine and Auckland. Looking through my old stuff I found a bad link to their web site that may have pointed to the eye nuts and to the portlights like yours.
Chatfield Marine - Contact Us

On my eye nuts the angled bottom noted earlier in this thread is an important feature, and the far more common style of eye nut with a flat base would not self center in the forks.

[GILow]

Originally Posted by Searles

They are called dogs or hold down dogs in this part of the world ,had the last lot made at the local brass bronze foundry at Bowden ,adelaide , using a good one as a pattern ,then to a metal finisher, came out better than new ,verry good price too .⛵️⚓️

Yikes! $25 each!

Pass.

[newhaul]

Originally Posted by GILow

Yikes! $25 each!

Pass.

Send me an old one I can cast them a lot cheaper than hat including shipping from my family forge . We also do make our own steel and castings for pomels and handguards so casting a few small bronze fitting would be a nice change of pace .

[GILow]

Originally Posted by newhaul

Send me an old one I can cast them a lot cheaper than hat including shipping from my family forge . We also do make our own steel and castings for pomels and handguards so casting a few small bronze fitting would be a nice change of pace .

Can’t figure out how to PM a picture, so I’ll post it here.

[newhaul]

Originally Posted by GILow

Can’t figure out how to PM a picture, so I’ll post it here.

Attachment 256395

Ok I will pm my email to you

[Spot]

Originally Posted by GILow

Can’t figure out how to PM a picture, so I’ll post it here.

Attachment 256395

You mean to tell me they still use milli-meteors in Oz?



Just kidding. All the best.

[newhaul]

Originally Posted by Spot

You mean to tell me they still use milli-meteors in Oz?



Just kidding. All the best.

Ok looks like flat mating surface and not tapered.

[Spot]

Originally Posted by newhaul

Ok looks like flat mating surface and not tapered.

The 'regular' eye nuts do not have the tapered / conical section right after the mating face heading towards the loop. If you and Matt want the CAD for this let me know, it might need some improvements in the corners to be cast-able. Assuming 3/8-16 tapped hole and 3/8" loop I get 3.3 oz in bronze, 3.6 oz without the threaded hole.

[Sand crab]

Cone nuts and cone washers are readily available. Perhaps an oversized nut so it won't grip the threads will do or just use a cone washer if you can get the right taper.
But can you just clean up what you have by bead blasting, sand blasting, wire brush? Possibly galvanize it afterwards? Chain regalvinizers do this all day long.

[wsmurdoch]

For comparison I just weighed one of mine. It is 2.85 oz. The 5/16 threading I reported in post #15 is incorrect. Mine are actually 3/8.

[newhaul]

Originally Posted by Sand crab

Cone nuts and cone washers are readily available. Perhaps an oversized nut so it won't grip the threads will do or just use a cone washer if you can get the right taper.
But can you just clean up what you have by bead blasting, sand blasting, wire brush? Possibly galvanize it afterwards? Chain regalvinizers do this all day long.

Yes but there is something to be said for custom casting work .

[Spot]

Originally Posted by newhaul

Yes but there is something to be said for custom casting work .

I love me some custom casting work

Originally Posted by wsmurdoch

For comparison I just weighed one of mine. It is 2.85 oz.

Thanks for weighing your part. I can see about making the CAD model a little lighter through the loop.

[newhaul]

Originally Posted by Spot

I love me some custom casting work



Thanks for weighing your part. I can see about making the CAD model a little lighter through the loop.

If you already have it in cad would love a copy of that . Will save my middle son some work .
Will likely print a plastic one to make molds from . Sounds like I could sell a few hundred of them to people doing upgrades . And a lot cheaper than $25 each .

[wsmurdoch]

This is a picture of one of these oval portholes with the factory screen fitted in it. The picture is from a friend's boat. The screen is built like a brick s___house and should last until... well forever. I have never seen the screens for sale although screensofschoonerbay.com makes similar but less robust screens for these ports.