What is the most common method of safetying nuts, bolts, and screws?

The most common method of safetying nuts, bolts, and screws is double twist safety wiring. This method involves threading safety wire through the heads of fasteners and twisting it in a way that secures the fasteners in place. The double twist creates a more secure and stable connection because it reduces the chance of the wire unwinding or becoming loose under vibration or movement.

Using double twist safety wiring is particularly beneficial in situations where high reliability is necessary, such as in aviation and other critical applications, to prevent fasteners from loosening over time. The increased security of the double twist also protects against potential failures, contributing to overall safety.

While other methods like single twist safety wiring, the use of lock washers, and the application of adhesive have their respective applications and advantages, double twist safety wiring is recognized as the most effective and reliable method in terms of securing fasteners against loosening.