A bolt becomes fatigued from working back and forth when it is too loose. The problem is MOST-Likely to occur when the assembly is not properly:

Question

Quizplus · Accepted Answer

When a bolt is too loose, the assembly may not have been properly torqued, which can lead to the bolt becoming fatigued from repeated stress. Cross-threading, drilling, and annealing are not related to the issue of a bolt becoming fatigued from working back and forth.

A Bolt Becomes Fatigued from Working Back and Forth When