This gauge is a mount back which means it has a threaded connector on the back that is either 1/8" or 1/4" Male pipe thread , Usually air compressors use 1/4" you need to find out the threads on the back of the gauge, Gauges go bad because moisture gets into the gauge and in cold weather it freezes breaking the gauge,
I purchased mine locally and m store location had several different versions and sizes. They also had a pretty decent selection of fittings adapters and such. Easy install, I would suggest replacing all fittings while doing the install.
national pipe thread is 1/8 inch on this guage