Which type of nut is used to prevent loosening once installed on a ground stud?

The self-locking nut is designed specifically to prevent loosening once it is installed on a ground stud or any other application. This type of nut features a mechanism that provides resistance to vibrational forces, which can cause conventional nuts to loosen over time.

Self-locking nuts typically have an additional component such as a nylon insert or a deformed thread design that creates friction against the threads of the bolt or stud. This friction is crucial in maintaining the integrity of the joint, as it keeps the nut securely in place, even when subjected to vibrations or movement.

Other types of nuts have different functions and attributes. For example, a hex nut is standard and does not have any locking mechanism, which means it may loosen under vibrational conditions. A wing nut is designed for easy hand-tightening and quick adjustments, but it lacks the security features needed to resist loosening under stress. A cap nut, while protective and aesthetically pleasing, does not provide any locking mechanism either. Therefore, a self-locking nut is the best choice for applications where preventing loosening is essential.