Continuous curve countersink and rivet head structure for riveted work pieces

摘要

A fastening system having a continuously curved countersink section in an aperture through a plurality of workpieces, with a corresponding rivet having a continuously curved head portion substantially congruent to the continuously curved countersink. Rivets equipped with the continuously curved head surfaces taught herein, when mated with a continuously curved countersink, provide sufficient resistance to fastener pull through, cause cold working of the rivet upon insertion of the rivet into the aperture and impose an elastic load upon the workpiece and rivet, strengthening the joint.