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Is a US garden hose connector any kind of standard pipe thread? So that it could be screwed into a normal, say, threaded iron or PVC pipe?
I've tried a couple samples of what I had on hand and though the thread may start it doesn't really want to go on.
No, a US garden hose thread is its own thing.
This table has a useful comparison:
Note that the hose thread (called "GHT" in plumbing circles) clearly does not match ANY of the other thread specifications in this table of common sizes. I circled some table entries with the closest dimensions to GHT just for emphasis.
Though it's "3/4" diameter is nearly the same as several others, the threads-per-inch are quite different.
I suppose that the designer wanted it to screw on with fewer turns, hence the low TPI count for the common 3/4 size. Maybe this makes manufacturing tolerances easier also.
So the only way to make a screwed-together attachment is to use an appropriate spigot, bibb, or adapter.
