What is the most common application for nylon insert nuts?

Nylon insert nuts are specifically designed to resist vibration, making them highly effective in applications where components may experience movement or shaking. The nylon insert provides a locking mechanism by gripping the threads of the bolt when the nut is tightened. This creates friction that helps prevent loosening due to vibrations, which is a common issue in machinery and automotive settings.

The other applications mentioned—high temperature environments, heavy load bearing, and electrical connections—do not effectively utilize the unique properties of nylon insert nuts. While they might perform adequately in various situations, the primary and most significant benefit these nuts provide is their ability to maintain tightness in the presence of vibrations, making vibration resistance their most common application.