To Cap It All

[egaParticipant @ega]

MichaelG:

You may yet be right about the solder.

I've tried to take a better photo having first cleaned part of the area you highlighted:

I recall learning from a recent post in another thread that solder comes in colours other than the usual silver-grey and if it is indeed soldered this may account for my not being able to distinguish solder from parent metal. I believe I took the possible joint line visible in the photo for the point where the boring tool stopped.

I take it that even a grossly-overheated radiator is not going to melt solder!

I haven't done the same with the outside surface as I didn't want to disturb the patina.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by ega on 28/08/2021 22:57:55:

[…]

I take it that even a grossly-overheated radiator is not going to melt solder!

I haven't done the same with the outside surface as I didn't want to disturb the patina.

.

Many thanks for taking the trouble to check … I’m intrigued by the production methods for items like this [not least because some of my ancestors were brass-workers].

Regarding the ‘grossly-overheated’ point : I did wonder if this might be a rather unsophisticated attempt at a safety valve !

MichaelG.

[Martyn Nutland 1Participant @martynnutland1]

This is all wonderfully illuminating…and all to do with something very simple (ostensibly). I'm gratified that we all broadly agree an approach.

I find on the internet there's a company (in the US) called Sealcon that have thread adaptors that have a female PG29 thread at one end. That ought to get us half-way there. I haven't contacted them yet and there may be other suppliers closer to home.

If Bob so generously wants to provide a bit of marine bronze here in France I'm at

4 Place de l'Eglise, 80150 GUESCHART (it's on the Somme) I can pay in France no problem – UK, not so straightforward I'm afraid.

Thanks again for all the info.

Martyn

[lee websterParticipant @leewebster72680]

The radiator cap on my 1930 A7 special is a steel plumbing fitting of the correct thread with an old penny placed on the top which was then covered with plastic filler and carved to shape. Made some 60 years ago. Not by me I might add, but I approve!

Lee

[Speedy Builder5Participant @speedybuilder5]

Martyn, sent you a Private Message

Bob

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