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PROTO Socket Adapter Set, Input Drive Size 3/8 in, 1/2 in, 3/4 in, Input Drive Shape Square - 19C375|JHA4S - Grainger
SK PROFESSIONAL TOOLS Socket Adapter Set, Input Drive Size 1/4 in, 3/8 in, 1 /2 in, Input Drive Shape Square - 12D247|4518 - Grainger
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M14 Female to 1/2 inch 1/4 inch M10*1 Male Pressure Gauge Fittings,M20 Female to 1/2 inch 1/4 inch Male Pressure Gauge Adapter|Pipe Fittings| - AliExpress
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4pcs/lot 1/4 3/8 1/2 Drive Socket Adapter Converter Reducer Air Impact Socket Wrench Adapter Hand Tools Set|Wrench| - AliExpress
GRAINGER APPROVED Reducing Adapter: Brass, 1/2 in x 1/4 in Fitting Pipe Size, Female NPT x Male NPT - 46M452|706120-0804 - Grainger
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Dixon Valve & Coupling - 1/2 Male 3/4 Female MNPTF x FNPTF Industrial Pipe Adapter - 48776058 - MSC Industrial Supply
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