Anyone recognize this spigot?

Per Søvik

Graduate Student
Jan 31, 2012
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Norway
Hi guys, I bought a 300/250 mm rig without any papers or markings, most likely produced in China, and have a shortage of spigots and some other parts.
I'm aware that the rig isn't legal for most uses since it's not certified, but would still like to make it complete for my application (no overhead loads).
From the dimensions, my guess is that I'm most likely to find the parts in Australia or Asia. Anyone recognize the dimensions?

egg dimensions.png