Using my yearly non-electronics-related post quota*, as I think this is a reasonably interesting question, it has to do with pipes (not the internet), and someone on this forum knows the answer.
Suppose you have a pressure gauge with a standard 1/4" BSP or NPT thread. You screw it into the female BSP/NPT receptacle that you have, and tighten it up nice and tight. Here's my question: if you tighten it up until it feels nice and tight, won't the gauge be facing in an arbitrary direction? How do the people who set up industrial equipment always get the gauges facing the right way?
Is there really 360 degrees worth of rotation range that still gives an acceptable seal? Or do all pressure gauges have the threads starting off at the same point? Or do they see that it's at the wrong angle, take it off, and stuff another few layers of teflon tape on?
I'm sure this question has an easy answer known by almost anyone in the trade, but I can't for the life of me find it by Googling.
* No, there is no such thing
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