Fuel line flair

I won an old snap on flare tool which was made by imperial on ebay. It arrived today and I ran in the shop to try it. what a nice old American made tool it even feels right when you hold it. So I cut off a piece of tube and gave it a try. when I went to place the clamp over the 5/16 adapter it wouldnt fit (see photos) the clamp, screw piece is so short the point is actually in the hole when set right. Dagnabit!

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