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I'm threading some 3/4" black pipe for a gas line. I borrowed my dad's old Rigid 3-way hand threader. I ran the threader till the cutter was flush with the end of the pipe. The finished threads seem to be short, i.e., as compared to a factory applied thread on a nipple and 10' stick.
So my 3/4" threads are ~9/16" long and I can thread on a fitting by hand ~ 2.5 turns. Whereas the factory threads are 3/4 to 13/16" long and the same fitting can thread on 3.5 to 4.5 turns.
Should I be running the threader deeper into the pipe? Thx