Standard Steel Blind rivets have a steel rivet and mandrel, available in a standard diameter domed head.
Steel Pop Rivet, 5/32″ (.156″)
Steel Pop Rivet, Large Flange, 1/8″ (.125″)
Lightweight Dzus Weldment with S Spring, 1 1/2″ x 1 1/2″
Dzus Fastener, Self Ejecting