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Hillman 6-Pack 5/16-in x 1/4-in Threaded Coupling Fitting in the Brass Fittings department at Lowes.com
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Amazon.com: R410A Adapter 5/16 inches SAE Female to 1/4 inches SAE Male Flare for Air Conditioners HVAC, 2 Straight Adapter + 2 Angled Adapter : Automotive
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Amazon.com: Beduan Brass Hose Barb Reducer, 5/16" to 1/4" Barb Hose ID, Reducing Barb Brabed Fitting Splicer Mender Union Air Water Fuel : Industrial & Scientific
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