Jet nut

A jet nut, also known as a jet lock nut or jet hex nut, is a type of fastener that incorporates a feature designed to prevent loosening due to vibration or thermal expansion. Jet nuts are typically used in aerospace and other high-performance applications where reliability is critical. These nuts often have a nylon insert or a similar locking mechanism that grips the threads of the bolt, helping to keep the nut securely fastened in place.