Under certain conditions, why are type A rivets not used?

Type A rivets are not commonly used under certain conditions primarily because they have low strength characteristics. This makes them unsuitable for applications requiring high strength-to-weight ratios or where there will be significant loads and stress on the fasteners.

In aerospace and structural applications, strength is a crucial factor; components need to endure various forces during operation. If a rivet does not provide adequate strength, it could lead to structural failure, making these rivets impractical in high-stress environments.

While other factors such as cost, installation difficulty, or the need for special tools might also play a role in the selection of rivets, the defining characteristic that affects their use under certain conditions is their strength. Thus, when considering the demands of an application, low strength characteristics render type A rivets less favorable compared to alternatives that offer greater durability and reliability.