hex pipe bushing. It might be thread sealed or basically loctited in there.
It would seem unlikely that its a 2-1/2" NPT size. Reason is the nominal pipe size is supposed to be near the ID in Sch 40. As I recall 2" NPT Sch 40 has an OD around 2-3/8 (due to 3/16" wall thickness). So this would be close to the major diameter of the threads cut into a just-cut pipe. Also 2-1/2" NPT while probably somewhere in the tables is an extreme rare bird as far as commonization*. 2" and 3" NPT are more standard steps.
* sprinkler fitters seem to bust out all the weird pipe sizes and call out fittings that I've never seen before like they are common as cheerios. But they have their own supply chain.
Hello, I'm looking for a bung for my compressor that will take a 1/2 " pipe thread in the center. The bung in the compressor has 2.5 stamped on the outside with the threads measuring about 2.3 across. I am assuming this is a 2.5 inch plug. What would be the correct google term to find this? thanks
My thoughts are to get out a heat gun (like a hair dryer but more industrial) for awhile and get the plug up to a temp where you don't want to touch it. If that's not enough, a propane torch could be used with care, before you get out a 36" pipe wrench. Reason: the Loctite-based products start to get gummy around 200F and rapidly lose strength. Not 100% certain its traditional Loctite blue or red, but guessing its something pretty close.
Why go with 1/2" when you replace the bung plug ??
I'd go 3/4" while you've gone to the trouble of taking it out, that way you could use 3/4" hydraulic hose as your connection from compressor tank to airline system.
What size is this compressor tank ??