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:
M8 M10 M12 rosca macho métrica x 6/8/0.394 in OD manguera de latón púas adaptador de conector de empalme - (Color: M10 x 1 a 0.315 in) : Industrial y Científico - Amazon.com
ITROLLE M10 to M12 Threaded Tube 4PCS 10mm M10 Female and M12 Male Allthread Allthread Hollow Threaded Rod Tubes Adapter Thread Sleeves Thread Extension Tool for Electrical Lamp Socket - - Amazon.com