For what types of applications are self-locking nuts not allowed?

Self-locking nuts are specifically designed to prevent loosening due to vibrations and other dynamic forces. However, they are not suitable for applications where either the bolt or the nut is subject to rotation. This is because the self-locking feature relies on friction to maintain tension and prevent loosening, which can be compromised if the threading of the nut or bolt is continually rotating.

In situations where the nut or bolt rotates, the friction created by the self-locking mechanism is reduced, leading to the potential for the connection to loosen. Thus, applications involving pivot points, rotating machinery, or any scenario where the joint experiences relative motion between the nut and bolt should avoid the use of self-locking nuts to ensure the integrity of the fastening.

This principle is essential in aviation mechanics, where safety and reliability of components are paramount, and following appropriate fastening techniques is crucial to prevent failure.

High temperatures can affect the effectiveness of self-locking nuts, but this is not inherently a disqualifying condition like the rotation issue. Non-static loads may also call into question the use of certain fasteners, but again, it depends on the specific dynamics involved rather than directly ruling out self-locking nuts. Stripped threads, while compromising the integrity of the connection, suggest the