What feature do most rivets used in aircraft construction possess?

Most rivets used in aircraft construction possess dimples, which are small indented or recessed areas on the head of the rivet. These dimples play a crucial role in the riveting process, as they help to create a better grip and mechanical interlock upon installation. This ensures that the rivet is properly seated in the material, contributing to the structural integrity of the aircraft. The dimples also aid in alignment during the riveting process, making it easier to ensure that each rivet is accurately placed for optimal strength and durability.

The features of rivets are designed specifically for their application in aerospace environments, where reliability and performance are critical. This is why rivets differ significantly from other fasteners that may have holes, threads, or coatings; those attributes do not provide the same benefits in terms of securing metal components under the demanding conditions faced in aviation. Dimples are integral to achieving a strong bond and ensuring long-lasting connections, which are vital for the safety and performance of the aircraft.