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6PCS Stainless Steel Inner Outer Thread Adapter Screw Conversion Nut Internal And External Screw Adapting Nut M4 M5 M6 M8 M10 - AliExpress
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Amazon.com: M20 to 1/2" Inch NPT thread adapters. ( $8.44 Each - Sold in 10 Packs ) M20X1.5 threads on external side. 1/2" Inch NPT threads on internal side. Nickel plated brass
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Uxcell M10 to M6/M8 20mm Long Double Male Threaded Reducer Bolt Screw Fitting Adapter 6 Pack - Walmart.com
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10PCS Thread ADAPTERS M8 8MM Male to M6 6MM Female Threaded Reducers Stainless Steel Fastener Accessory: Amazon.com: Industrial & Scientific
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