Mysterious steel blank found with a load of US cents

This Mysterious steel blank was found with a load of US cents, it sicks to a magnet and weighs aprox 2.1g I have no idea what it could be but I dont just want to discard any ideas on what I can do to identify what the blank might be please ??

 

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Electrical junction box knock-out. note the connection tab.

 

From the broken tab on the edge, my guess is one of these punchouts:

 

haha, Jinx!

 

hahahahahahaha outstanding Im going to have a break from looking at coins now

 

Delete this thread please as nobody will ever take me seriously again !!!

 

Make friends with an electrician, and you can get all you want of those.

 

I do see why you would think that, to be fair.

 

First.. Threads cannot be deleted. It's on here forever!
Second.. Don't feel the way you do. You're learning and that's good.
It would be worse if you said that we are all wrong and that we don't know what we are talking about.
Some newbies actually say those things to us.

 

I got a bit confused on one of these way back. Some come with the makers name stamped on them.

 

Going back to the original post, I am not so sure it is a plug. I see what appears to be a rim, which I've never seen on plugs before. It looks slightly dished, which the photos don't really show well. Some edge and rim shots might provide a better assessment. The corrosion or whatever the discolored area is, would tend to indicate the piece was plated, which lends itself to a plug, but I'm just not convinced at this point.

 

How many have you found with the ole detector?

 

Blank metal slugs?
Yesterday I detected 24 of them

 

Maybe now you have found a collector interested in them? Wonder how many you could mail in a flat rate box?

 

I was going to say that but I saw your post. That’s exactly what it is.

 

Yep, a knockout from a 4 square box for sure