Out on a Wet, Broken Limb

[partingclouds]

Hi, Quantum mind.
I need a source for a replacement
part for a cabin top hatch. The boat is from the 70's and even the good people at Atkins & Hoyle, who make Bomar hatches can't help me replace this part.

The part is the black mushroom-shaped cap on the exterior of the lid. It has a threaded hole on the interior that the locking dog screws into. I've tried repairing it, but there's a lot of pressure on it as the hatch locks and it just fails.

I'd not be adverse to buying a whole new pair of the complete mechanisms, both left and right, but don't know what will actually work. I believe it's referred to as a high profile hatch, but am not really sure.

I've been looking at websites for a few days now, with no success.

[Spot]

Hi PC, what material is the mushroom made from? Does it only bear on the hatch on the flat surface under the rounded head?

[Lake-Effect]

Try to find a boat-wrecker; they often have salvaged hatches and related hardware.

[JBP]

It would be fairly easy to make that part if you know someone with a lathe and a bottom tap. Delrin, nylon, or aluminum are all pretty easy to machine.

[JBP]

You might be able to make due temporarily with a barrel nut aka sex bolt aka binding barrel and butyl tape. They come in plastic, aluminum, and stainless.

Here is a 1/4 inch plastic one. Of course you have to buy 100 to get one.
https://www.mcmaster.com/product/90249A620

BTW, Do not search for nylon sex nuts, that is a different thing altogether!

[partingclouds]

Hi, Spot,

Thanks for chiming in. The mushroom cap shaped that's broken is a plastic material, and has a rubber O-ring on it's flat surface. It only breaks when l glue, epoxy, etc. it. There's a lot of pressure applied on it when dogging the hatch.