Standard Steel Blind rivets have a steel rivet and mandrel, available in a standard diameter domed head.
Steel Pop Rivet, Large Flange, 3/16″ (.1875″)
Closed End Blind Rivet, 3/16″ (.1875″ OD)
Steel Pop Rivet, 1/8″ (.125″)
Lightweight Dzus Weldment with S Spring, 1 1/2″ x 1 1/2″