and you’ve got yourself a cheap airline.
I was dead chuffed with the 1/4" NPT tapered thread, especially as I was only half way through stripping it when I decided to stop turning the spanner.
Fair point. I’ll check it from time to time, but I’m assuming the worst that can happen is I’ll find a pinhole leak one day. Then I can just get another abandoned cylinder.
Whatever else, it’s a big advance on blowing swarf out of blind holes with a straw.