Traditionally mechanical devices were used to ensure that screws, nuts and bolts etc would not come loose. Although they were made for this purpose, they have several shortcomings.
Loosen under vibration, thermal expansion and/or improper torque
Do not seal threads
Require extensive inventory of several shapes and sizes
Prone to rust
There is now a better way, Invented 50 years ago by Loctite Corporation, now Henkel Corporation,
This revolutionary method to lock and seal threaded fasteners with liquid anaerobic adhesives has found worldwide acceptance. Suited for a wide range of applications, from delicate electronic components to heavy industrial equipment, Loctite threadlockers
have dramatically increased the reliability of threaded assemblies.