Which component of a rivet gun contacts the rivet?

The rivet set is the component of a rivet gun that directly contacts the rivet during the riveting process. It is specifically designed to transfer the force applied by the rivet gun onto the rivet, which is essential for properly deforming the rivet and ensuring a secure and effective fastening of the materials being joined. The rivet set comes in various shapes and sizes to accommodate different types of rivets and applications, allowing for versatility in metal structural repairs.

In contrast, the pressure reducer regulates the air pressure supplied to the rivet gun, ensuring optimal performance without exceeding pressure limits. While it is crucial for the overall functioning of the rivet gun, it does not engage directly with the rivet. The pneumatic cylinder generates the force needed to drive the rivet set, but like the pressure reducer, it does not make contact with the rivet itself. The trigger mechanism is responsible for initiating the operation of the rivet gun but does not influence the contact with the rivet. Thus, the rivet set stands out as the correct answer since it's the part that directly interacts with the rivet to facilitate the fastening process.