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Amazon.com: 10pieces/lot M4/5/6 to M10, M8 to M10, M10 to M12/M14 Threaded Hollow Tube Adapter Inner Outer Threaded Coupler Conveyer Adapter - (M8 to M10, Zinc Plated, Thread Diameter: 1.0mm Pitch, Length:
XQSMWF 5Pcs Thread Screw Sleeve Conversion Nut for M10 10mm Male to M8 8mm Female, Bolt Sleeve Nut Thread Screw Fitting Reducer Adapter: Amazon.com: Industrial & Scientific
Reducer Metric M10 M10X1.0 Male to M8 M8X1 Female Headless Adapter (2 Units)
XQSMWF 5Pcs Thread Screw Sleeve Conversion Nut for M10 10mm Male to M8 8mm Female, Bolt Sleeve Nut Thread Screw Fitting Reducer Adapter: Amazon.com: Industrial & Scientific
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Amazon.com: Zkenyao-Brass Connector M8 M10 M12 M14 M16 M18 M20 M22 Metric Male Thread Brass Pipe Fitting Plug Internal Hex Socket End Cap Connector Adapter, Simple to Install : Industrial & Scientific
XQSMWF 5Pcs Thread Screw Sleeve Conversion Nut for M10 10mm Male to M8 8mm Female, Bolt Sleeve Nut Thread Screw Fitting Reducer Adapter: Amazon.com: Industrial & Scientific