Rivetsonline
3/16th aluminum mandrel closed end blinds in a few lengths depending on thickness of material(s) you're going thru. Wide flange for going thru the deck.
Plus some brazierhead solids.
Sorry for all the questions but I am not a rivet guy. It is asking me Countersunk or Dome for the head? Grip Range? Max length? Also, what are brazierhead solids?