Which safety feature is designed to prevent movement of the arming heads, arming stems, and strikers while the fuze is being handled?

The safety feature designed to prevent movement of the arming heads, arming stems, and strikers while the fuze is being handled is the safety clips. Safety clips are used in munitions to secure these components in place, ensuring that they do not inadvertently move and activate during handling. This is crucial to maintaining the safety and stability of the munition before it is armed and ready for deployment.

In munition systems, ensuring that all components remain securely in their designated positions during transport and during preparation is essential to prevent accidental detonation or malfunction. Safety clips effectively provide this necessary level of protection, thereby enhancing safety procedures surrounding munitions handling.

In contrast, while cotter pins are used for securing components in various mechanical settings, they are not specifically designed for this particular purpose related to fuze stability. Locking nuts mainly provide tension and prevent loosening in threaded applications, and trigger locks are generally utilized in firearms to prevent accidental firing rather than securing fuze components. These distinctions underscore why safety clips are the appropriate selection for the question posed.