No. This sizing you see is NPT, typically used for Natural Gas pipe. National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings. In contrast to straight threads that are found on a bolt, a taper thread will pull tight and therefore make a fluid-tight seal. The Thread Pitch of 1/2" NPT and 3/4" NPT is 14 TPI (threads per inch). The Pipe Nominal Outside Diameter is 0.84" for 1/2" NPT and 1.05" for 3/4" NPT.