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A rivet is a fastener that consists of pin with a head on one end that is stuck through multiple pieces and the other end flattened down to form a second "head". It's used in situations where a smooth surface is wanted, as on airplanes.

Rosie the Riveter was an iconic figure during WWII, encouraging support of the war effort. Studying such icons can result in riveting discussions.

Taken up and treated here.