Originally Posted by
awac
....
Linseed oil count? Helps lubricate a bolt thread on assembly and then dries locking the thread. That is an interesting thought, what is the oldest threadlocker?.....
Yes, I'd count linseed oil, and others that act similarly. There are also a variety of things that work, including intentionally distorting a section of the threads to cause some binding.
FWIW I appreciate the value of thread lockers which add a degree of functionality not available in certain situations. Anyone who's been turning bolts long enough remembers when adjustment screws all used stiff springs to create load and maintain position.