Originally Posted by
Flying10uk
David I don't know how much practical experience of thread and screw cutting you actually have.
Perhaps you have access to a vast stock of obsolete screws and nuts of every imaginable size and every conceivable thread, not all of us do.
Therefore, if I don't have the exact size required to do a particular job I may look for another way round the problem. That my mean making a screw on my vintage lathe by cutting the thread or it may mean using something else that is similar and will do the job.
I don't make a habit of tightening up screws/bolts so tight that the thread strips.