Then you have "garden hose thread" (literally called GHT), and a bunch of other stuff but if you deal with plumbing in the US, it will be NPT for 95% of it, with the other 4.99% being hose bibs ...

Plain ol’ National Pipe Tapered (NPT) pipe fittings are designed for low-pressure fluids of 300 psi or less. ... -Straight-Thread O-Ring Fittings are the ones you thread into place, ...