What type of bolt would you use in a high tolerance application in aerospace structures?

In high tolerance applications, particularly in aerospace structures, the use of close tolerance bolts is essential. These bolts are manufactured to precise dimensions and tolerances, which is critical in applications where precision assembly and load transfer are paramount.

Close tolerance bolts are designed to ensure a snug fit and to minimize play between the bolt and its corresponding hole, which helps maintain the structural integrity of the assembly under dynamic loads and environmental conditions. This type of bolt also reduces the risk of galling or loosening due to vibration, making it ideal for use in applications where safety and reliability are non-negotiable.

In contrast, standard aircraft bolts, high-strength bolts, and general-purpose bolts do not offer the same level of precision in fit and tolerance. While they may be suitable for many applications, they lack the specific manufacturing tolerances required for high-performance aerospace structures. Therefore, in scenarios demanding exacting standards, close tolerance bolts are the optimal choice.