/Keystone RV Company (Keystone) is recalling certain 2021 Fuzion travel trailers (models 357, 369, 373, 379, 419, 424, 427, 429 and 430) and 2021 Impact travel trailers (models 343, 359, 367 and 415). The auxiliary fuel supply tank mounting straps may have been improperly secured with grade 2 bolts instead of grade 5 bo/