wheel cyl. fitting

well, i have 2 brand new wagners in the box that has the same fitting. the inverted flare nut fits the cyl. and will tighten down good, but dont know if it will seal. tried napa, the page just says no products shown, like they dont sell brake lines, right. :roll: anyways, i thought they might make a flaring tool for it, just was'nt sure. thought about going to midas brakes down here, but these morons probably never even heard of a dart. thanks.