Any ideas on this metal P

Bible

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Jan 6, 2020
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Giant oil plug?What do you all think?
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I think I'm seeing a standard pipe coupler with a standard end plug ?
 

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Soooo its junk? Doesn't signify anything?
 

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I could be missing something, Bible, but I don't recognize anything special. Remember using plumbing parts like this for air lines. You can see the marks from a pipe wrench being used. I don't remember "dedicated" plugs ... often saw manufacturer's marks on the ends, was all.

I tossed used parts like this in coffee cans, just in case I needed something in a hurry. Usually took more time to clean them and check the threads, but they would work, and save a trip to the store. You've got a coupling and an end plug ... as is, they give you an end cap, also. Kind of depends if you're more of a fix-it kind of guy and might need something in a pinch. The parts are cheap, so it usually felt better to just pick up a new one at the hardware store.
 

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I assume that you're asking what the metal is that the iron oil plug is threaded into? :icon_scratch:
It almost looks like zinc, but I'm now thinking it's galvanized iron.

Dave

"Galvanizing is one of the most widely used to methods for protecting metal from corrosion. It involves applying a thin coating of zinc to a thicker base metal, helping to shield it from the surrounding environment. The next time you are in your car, take a look at the street signs and lamp posts you pass. A large number of them will have a mute, silver color on them. That “silver” is actually the coating of zinc. Quite simply, galvanizing a metal gives it anti-corrosion properties. Without the protective zinc coating, the metal would remain exposed to the elements and potentially oxidize and corrode much faster. Galvanized Steel is a cost-effective alternative to using materials such as austenitic stainless steel or aluminum in order to prevent corrosion."
 

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