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Amazon.com: COLICOLY 3/8"-16 Female to 5/8"-27 Male Screw Thread Adapter for Microphone Stand Mount - 2 Pack… : Musical Instruments
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Hillman 5-Pack 5/16-in x 3/8-in Threaded Coupling Adapter Fitting in the Brass Fittings department at Lowes.com
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Amazon.com: Beduan Brass Hose Barb Reducer, 3/8" to 5/16" Barb Hose ID, Reducing Barb Brabed Fitting Splicer Mender Union Air Water Fuel : Industrial & Scientific
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