Replacing kitchen faucet - 15mm tubing to 3/8" metal nut?

Apr 12, 2007
177
Hunter 420 Herrington Harbor South
I am trying to replace the old faucet with a newer one. the problem I ran into was going from the 15mm water lines to the new faucet 3/8" connections.
I can find no such connectors. I did try 15mm to 1/2" female Whale QC connector (fit fine) then a 1/2" to 3/8" metal adaptor. Apparently the 1/2 female connector and the metal adaptor threads are a mismatch and will not seat. Open for suggestions please!
 
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