Standard aluminum Blind rivets have an aluminum mandrel, available in a standard diameter domed head.
Dzus Fastener, S Spring (1″ hole centers)
Steel Pop Rivet, Large Flange, 3/16″ (.1875″)
Steel Pop Rivet, Large Flange, 1/8″ (.125″)
Closed End Blind Rivet, 1/8″ (.125″ OD)