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Countersunk head blind rivets consist of a cylindrical mandrel and a hollow rivet pin with a countersunk head used to fasten materials that have no access at the back. The rivet pin is inserted through a hole, and with the use of a riveter or a rivet gun, the mandrel is pulled. As the mandrel is pulled through the rivet, the rivet is deformed and creates a second head on the blindside as the mandrel snaps off. The exposed head of these types of blind rivet seamlessly rests in conical or countersink holes and leaves a flat surface with no protruding head. Countersunk head blind rivets are used in fastening metal sheets, cement boards, and wood in construction, automotive, assemblies, and electronic industries among others.