Universal Car Auto Aluminum Alloy Oil Filter Cooler Sandwich Thread Plate Adapter Oil Cooler Kit Blue M20x1.5 1/8 NPT - Walmart.com
AN10 - M20x1.5 Adapter
Metric Thread Female M20 M20x1.5 to Male M10 M10x1.0 Pipe Fitting Adapter Gauge | eBay
Amazon.com: Fitting Metric M20 M20x1.5 Female to 1/2” NPT Male Gauge Sensor Adapter : Automotive
Amazon.com: uxcell Pipe Fitting Reducer Adapter M20X1.5 Male to 1/2 G Female, Stainless Steel for Water Oil Air Pressure Gauge : Industrial & Scientific