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Forney 75533 Brass Fitting, Reducer Adapter, 3/8-Inch Male NPT to 1/4-Inch Male NPT - Air Tool Fittings - Amazon.com
Brass Pipe Fitting,3/8 Inch NPT Male to 1/2 Inch NPT Female Brass Pipe Hose Tube Fitting Hex Head Bushing Adapter Convert(5, 3/8 NPT male x 1/2 NPT female) - - Amazon.com
Anvil 2139 Forged Steel High Pressure Pipe Fitting, Class 6000, Hex Head Bushing, 1-1/2" NPT Male x 1/4" NPT Female: Industrial Pipe Fittings: Amazon.com: Tools & Home Improvement
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Amazon.com: Legines Brass Pipe Fitting Hex Bushing, 3/8" NPT Male to 1/4" NPT Female 1200psi (2pcs) : Industrial & Scientific