Rivet Test

There are two tests—the first is concerned with the shank and the second with the head of the rivet. The shank test consists of cold bending the shank and hammering until the two parts of the shank touch. There should be no sign of fracture on the outside of the bend. For the rivet head, the latter is flattened while still hot until its diameter is twice that of the shank. Cracks must not develop at the edges of the head.