What is the minimum distance from the edge of the metal to the centre of the rivet for a 3/16 diameter pop rivet?

The correct minimum distance from the edge of the metal to the center of the rivet for a 3/16 inch diameter pop rivet is 3/8 inch. This distance is crucial for ensuring proper structural integrity and effectiveness of the pop rivet.

When installing a pop rivet, maintaining an appropriate edge distance helps to prevent the metal from tearing or weakening around the rivet hole. The recommended edge distance—often at least twice the diameter of the rivet—ensures that there is enough material surrounding the rivet to support the load. In this specific case, with a rivet diameter of 3/16 inch, a distance of 3/8 inch (which is equal to 6/16 inch) provides the necessary support while allowing for expansion due to mechanical stress.

A distance smaller than this could compromise the firmness of the rivet and lead to poor attachment, while choices larger than this aren't necessary for the strength of the joint, making 3/8 inch the most appropriate choice. This consideration is essential in various applications in HVAC sheet metal work, where joint durability and stability are critical.