... , high strength, alloy and stainless steel3.Headdome and countersunk heads, large flange, multi-grip, and closed-end types4.Surfaceplain, ... with aluminum mandrels AS: aluminum rivets with steel mandrels AST: aluminum rivets with stainless steel mandrels SS: steel rivets with steel mandrels STS: stainless steel blind rivets with steel mandrels STSS: stainless steel blind rivets with stainless steel ...