Standard aluminum Blind rivets have an aluminum mandrel, available in a standard diameter domed head.
Steel Pop Rivet, Large Flange, 3/16″ (.1875″)
Steel Pop Rivet, 1/8″ (.125″)
Aluminum Pop Rivet, 5/32″ (.156″)
Steel Pop Rivet, Large Flange, 1/8″ (.125″)