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Amazon.com: M18 x 1.5 Stainless Steel 304 Female Threaded Stepped Weld Bung Metric Mounting Boss Fitting (OD 1.0") with Top Head (OD 1.2") : Automotive
Amazon.com: ATOPLEE M18 X 1.5mm Metric Right Hand Thread Die, 1pc : Industrial & Scientific
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Utoolmart M18 X 1.5 Metric Round Die, Machine Thread Left Hand Threading Die, Alloy Steel - - Amazon.com
Amazon.com: O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 pack Steel Bungs, M18 x 1.5) (10 pack Steel Bungs, M18 X 1.5) : Automotive
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