What is the main advantage of using a pop rivet compared to a traditional rivet?

The main advantage of using a pop rivet is that it can be installed without access to both sides of the materials being joined. This is particularly beneficial in applications where the back side of the joint is not accessible, such as in ductwork or other confined spaces.

Pop rivets, also known as blind rivets, can be installed by inserting them into a pre-drilled hole and pulling the mandrel with a specialized tool until the rivet expands and secures the two pieces together. This method allows for a secure connection without the need for a clamp or support from the opposite side, making pop rivets extremely versatile and efficient for many HVAC installations.

The other advantages noted, such as lighter weight or enhanced durability, may vary depending on specific materials and application circumstances, but the unique installation capability of pop rivets is what sets them apart and caters to a wide range of installation challenges in HVAC sheet metal work.