What is the difference between a nylon insert and all-metal lock nut?
Both nylon insert lock nut and all metal lock nuts are considered “prevailing torque” lock nuts, where they are designed to lock than normal nut.
The main things to consider between an all metal and nylon insert lock nut is the temperature and the corrosive conditions of the application.
Nylon insert lock nuts have a polymer insert on the threading to bite the screw thread. Nylon material will decided the condiftion They have a max usable temperature of about 350F. If you are using these Nylon lock nuts within this temperature range, this will be the most economic solution.
All metal lock nuts are for high temperature applications over 350F and are also excellent in highly corrosive applications as the corrosion limits are only from the metal and not the polymer.
