Now, before you think that this may be a simple thing, remember that the Navy operates warships in the harshest environments on the planet. Just like most complex mechanical objects, these warships are held together with countless threaded fasteners...nuts and bolts.
The removal, inspection, and tightening of these threaded fasteners is vitally important to ensure that one of this nation's warships can go into harm's way, take battle damage, and come out victorious and still afloat.
The Navy's procedure for the use of threaded fasteners is Naval Ships Technical Manual 075. This publicly available document is simply awesome if you want to know the theory behind and methods used to ensure your threaded fasteners are properly tightened and stay that way.
I did a 4-part set of videos focusing on the classic car application of NSTM 075. I'll warn you that a lot of it is me talking, but there's a lot of good information in there. I hope you learn something!