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Proline Series 3/8-in x 1/2-in Threaded Flare x Mip Adapter Union Fitting in the Brass Fittings department at Lowes.com
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Amazon.com: Brass SAE 45 Degree Flare Fitting Seal Plug Assortment Kits,1/4" 5/16" 3/8" 1/2" 5/8" Tube OD(5pcs) : Industrial & Scientific
BROWNING, Fits Multiple Brand, Universal, Inverted Flare Fitting, 1/2" Sweat, Tube Nut - 50PL18|436-220 - Grainger
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