What is This Device?

My guess is, and I can't prove it, but due to the fact that it flexes some, is that it is an old freeze plug...........either to a car engine or some other piece of equipment.

Here is a threaded freeze plug......same thing, the threads terminate on the end with the square hole.

Hmmm I don't think the whole assembly would flex enough to pop out, except under extreme conditions: and then the thread of the engine block would probably be damaged. I don't think there is enough space behind the inner sheet to allow for enough expansion to relieve the pressure of frozen coolant.

I don't know anything about this sort of thing, but, I think your pictures are of a core plug rather than a freeze plug.

I did a google search for 0747 Z plug and found this. It's a distributor blanking plug for a Triumph motorcycle, whatever that is. Maybe a little closer. No pics of the inside. I've actually seen something like that before, with the thinner metal on the inside, but I have no idea where.

Before you cut it open, try boiling it/freezing it and see if anything happens on the inside. Whatever is underneath, I would think, would be temperature activated.

I have written to a motor cycle parts place selling one on E-Bay to ask for their opinion. Hopefully all will be revealed soon.

I hope so, I've actually got other things I'm supposed to get accomplished today.

".......for a Triumph motorcycle, whatever that is."

http://en.wikipedia.org/wiki/Motorcycle

I meant the distributor blanking plug.

I knew I'd get that smarta$$ comment after I read my post.........I figured it would probably come from lynch. You beat him to it.

I actually owned a '58 T110 in the '80's. Traded it for a gun. Wish I had it back.

Sorry, I was being a smarta$$ in another thread at the time.

No need to apologize.

Someone accused me of being on the lyndoor payroll on another thread, and I responded that I thought your smarta$$ answers were funny.

Of course, I don't have feelings, so you can't hurt me.

Found it http://cr4.globalspec.com/comment/676960/Re-hello-to-all

Oh, that's just bob c.

He thinks he's a mechanic.

_{That'll get him stirred up!}

The so called "freeze plugs" in accuallity are "core plugs" They were never intended to pop out upon freezing. core plugs are used for exactly that- plugging the holes left over from casting the engine block.

oilcan13

Does PlbMak know?

So that's where it went. I've been looking for that thing everywhere. Can I have it back, please? <Splutter>

Nooooo......

Is it the Antikafrinton device ?

"Harwich for the continent, Frinton for the incontinent."

If anybody can disprove me, I'll sit corrected.

I don't think you can take the piss out of Frinton, unless they did actually open a pub there afterall.

At first glance I thought it could be a brush cap. Its too big in diameter.

A adjustment screw for regulator.

Well, clearly it's from a 747 airplane. All you need to do is get the blueprints and look for the part marked "Z".

Looks to me to be a threaded end cap for a cast iron sanitary clean-out. Just a guess and I could be very wrong, but hey, nothing harmed by aiming high, eh!?

Maybe just maybe it fell off an UFO? LMAO! Oh I'm a bad boy.....sore subject in CR4 lately....

You're getting real popular moosie! We've even got spillover from the bathtub landing in the ufo thread.

Just trying to be entertaining, but some folks, no matter what, tend to be very much in touch with their anal side, ya know?

Have a great day kram!

Aaaahh. You mean the drain plug for an S or P trap. Could be: but why would it have that thin flexible sheet on the inside?

Are you sure that the "thin sheet" isn't an artifact of the corrosion on the underside (maybe along a metal internal flaw) so at one time it was solid?

Yes I'm sure. When you examine it carefully you can see that the sheet is corrugated in concentric rings to give it the flexibility to move in and out.

Looks like a cap for a floor mounted electrical receptacle. The size is correct. I have installed several of them and have a few in my house and the cap looks very similar, just newer.

I'm thinking so too

Power sockets (and plugs) in the UK are a lot bigger than the US, so it wouldn't be big enough. Of course I suppose it could have found its way across the pond.

Also that wouldn't explain the flexible inner skin.

Actually, its the manhole cover from the sewer outside Barbie and Kens Playhouse. the bottom is all banged up cuz GI Joe was pounding on it so he could come out and Play.

Milo

This almost looks like an end cap off of a rebuildable boric acid high voltage cartridge fuse.

Would that be dangerous? Should I take it out of my back pocket?

It wouldn't be a surveyors benchmark, would it?

Nice pictures BTW.

I was just reading through the posts and couldn't help but think to myself, "What the hell is wrong with us?"

All of this interest in a little metal plug........................I'm as guilty as anyone.

It's all fun. I'm just glad my wife doesn't get on here and see what's eating up so much time. She'd probably seriously consider having me committed.

She'd be right!

Milo "guilty as charged!"

It's a gnome escape hatch for a model 747. You can imagine were the dents come from because it can only be opened from the outside.

This is manufactured in a small workshop in deepest, darkest Nihilland, where a dedicated team of precision engineers devote their time to designing and manufacturing devices that look like they ought to fulfill a purpose or have a function, when in fact they do not. These are then distributed around the globe, on pavements and driveways, and particularly next to expensive looking cars and motorbikes, seemingly to occupy the time of curious engineers. In fact, the real (unknown) purpose is to plug pinholes in the space/time continuum, hence the 'screwdriver' slot which will accept all coinage, from Polish Zlotys to Klingon Zarks.

In fact, it looks a bit like the rocker cover off an old motorbike, but the internal membrane is a bit puzzling.

I like it

GA

I don't think so tcm. Take a closer look at the crud on the thin metal. I think that happened in service. A gas regulator wouldn't have scale on it.

I think whatever it is has been in prolonged contact with the radiator coolant in a car or bike. That scale looks a lot like the build up on a radiator cap. I'm thinking that if they cut that thin metal open, they will probably find the same type of wax used in an automotive thermostat. That groove indicates a seat for a spring.

Okay, I'm willing to admit that I may have just a touch of OCD.

I think this is a Porsche oil cooler

That looks like a furnace regulator.

I am talking about the really big grey regulators and meter units that are on the outside of commercial buildings. I just used the gas grill regulator as an basic example that most people would be familiar with having seen in person.

A friend of mine has a scrap yard where I have taken a few apart and I recall seeing similar types of disks in one of them. As far as the crud goes that thing could have been laying out in the bottom of a scrap bin for who knows how long before the OP got a hold of it.

I want you to be right.

I think I've seen those up close before, I might be wrong, but I thought they were made out of pot metal, and solid. No flexible sheet on the bottom.

I only remember something looking something like this in one type of old commercial gas service regulator. I suspect that in the last 50+ years there have been countless other designs put into use.

Who knows I could still be wrong and it could have came from some entirely different device as well. I am only going by an educated guess based on memory of something I took apart years ago.

GAs for this and the previous post. So does this regulator work a bit like this:-

Where the "mystery" object is the disc at the bottom and the gas enters through the tube pushing up against the flexible surface?

Got it thanks: looks very plausible.

Not too sure: I think most of the crud on it is from its more recent history.

i have no idea what that plug is used for..............but to the OP, what is a

"load of hard core"

Broken bricks and the like which, you put down under the concrete in foundations and other concrete surfaces. There's probably a more common US term.

"Hardcore" is a perfectly common US term - but usually as an adjective for the word "pornography." Otherwise, it is sometimes used to mean "gung ho", especially for members of the military or criminals. None of these seemed germane. I'd probably ask for "rubble" or "aggregate" in the context described, but I'm not an expert.

Looks to me like an air bleed screw. The "lead in" is actually the seal face and by screwing it in a few turns you will allow air out without the risk of hot coolant blasting out. It would also account for the flex inner which would probably hold air, as previously supposed by Kramarat, as an anti freezing device.

Saludos

Capblanc

Do you mean like this?

Then yes that makes sense: could be.

The diaphragm on the inner surface (if it is a diaphragm) seems to be a crude version of the diaphragm used in a pressure transmitter. Like this one on a sanitary SS pressure transmitter.

Is it likely to be a pressure fluctuation dampener for a fixed pressure range in a mass produced item for something like a gas meter. The number is an ID for a particular range or application. The thread arrgt suggests for safety reasons it is inserted from inside the device and can only stay inside the device if tampered from the outside. From an operational safety aspect this doesn't seem to fit unless the system shuts off on zero backpressure. Given that this type of diaphragm is on the expensive side there must be good reason for whatever its use.

Just a guess and trying to help the cause.

My best guess would be a pressure transducer except that there is nowhere to attach, or, for access of wires to connect to the sensor. It certainly looks a lot like the one in your picture.

In the very first two pictures (clear back in the OP), the "taper" of the threads looks the same when the plug is inverted. Thus it seems to be a straight thread. The flat part near the center of the rippled diaphragm looks like a surface what would press on a rod or pin. Tcmtech's idea is definitely plausible, even if this turns out to be something else. (I have some smaller propane regulators on our sea cucumber cookers that are built about like this.)

The "taper" is really only on the one side (with the "coin" slot).

Yes the flat in the centre would only need to push on a rod to achieve the pressure regulator/demand valve functionality shown in this diagram from TCMtech's link:-