How can a D solid rivet be identified?

A D solid rivet can be identified by the raised dot on its head. This distinguishing feature is specifically designed for D rivets to provide a visual cue that helps differentiate them from other types of rivets. The raised dot indicates that the rivet is of the D type, which is typically used in applications where enhanced grip and load distribution are required.

The design of the head and the presence of the dot serve practical purposes in assembly and maintenance, allowing technicians and inspectors to quickly recognize the type of rivet being used. This identification is critical in aerospace applications where the integrity of joints and connections is essential for safety and performance.

In contrast, the other descriptions do not appropriately pertain to D rivets: a dimple or flat head may refer to different rivet styles or types, while two raised dashes would denote another specific kind of rivet. Understanding these characteristics is vital in ensuring proper selection and application of rivet types in aviation and aerospace fields.