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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 - (M6 to M10, Zinc Plated, Thread Diameter: 1.0mm Pitch, Length: 10mm) : Industrial & Scientific
1/2/5pcs Thread Adapter Male to Male Bolt M3 M4 M5 M6 M8 M10 M12 M14 M16 to M20 304 Stainless Steel Double Head Transfer Screw Bolt (Size : 1pc M10x25-M16x25): Amazon.com: Industrial
SING F LTD 2Pcs Double End Threaded Stud Screw Bolts M6 to M8 304 Stainless Steel Thread Adapter for Structural Columns Fasteners: Amazon.com: Industrial & Scientific
MECCANIXITY Thread Reducing Nuts Insert M10 x 1mm Male to M6 x 1mm Fine Thread Female Adapters 10mm Long Pipe Fitting Conversion Sleeve Reducer, Pack of 5: Amazon.com: Industrial & Scientific
Amazon.com : FEICHAO 2pcs Screw Adapter 1/4-20 Female to M5 M6 M8 M10 Male Screw with Reinforcement Side Hole for Tripod Camera Gimbal Accessories (1/4-20 to M8-1.25 * 7) : Electronics
Amazon.com : NovelGoal Cameras Screw 1/4'' to M6 M8 M10 Inch Male to Male Tripod Mount Adapter Quick Release Screw for DSLR Motorcycle Rearview Mirrors (2PCS,1 4 to M8) : Electronics
MECCANIXITY Threaded Repair Reducing Adapter, M10 to M6 Round Coupling Nut Female Thread Convert Sleeve Connector Rod Bar Stud Tube Nut, Silver Pack of 10: Amazon.com: Industrial & Scientific