Amazon.com: Yemtuls Reducer Fitting Metric M12-1.5 to 3/8 NPT Adapter Design for Adding 3/8 NPT Coolant Temperature Sensor to LS Engine with Factory M12-1.5 Female Coolant Sensor Port : Automotive
LS Coolant Temperature Sensor Adapter Fitting M12 X 3/8 NPT – LSXInnovations
Straight Barb Metric Adapter M12 x 1.5 x 3/8 - Phenix Industries
American Grease Stick Co. Steel Adapter, 3/8"-24 Inverted to M12 x 1.0 Bubble BLF-61B - Advance Auto Parts
Amazon.com: Metric M12 M12X1.5 Female to 3/8" Male NPT Pipe Fitting Gauge Adapter : Industrial & Scientific
Amazon.com: Yemtuls Reducer Fitting Metric M12-1.5 to 3/8 NPT Adapter Design for Adding 3/8 NPT Coolant Temperature Sensor to LS Engine with Factory M12-1.5 Female Coolant Sensor Port : Automotive
Swap Coolant Temperature Sensor Water Adapter Male M12 1.5 - Female 3/8 NPT - Walmart.com
M10x1.0 to M12x1.0 Fitting Male Union Coupler Adapter M10-M12
Amazon.com: Pipe 3/8" Male BSPP BSP to M12 M12X1 M12X1.0 Metric Adapter Fitting Fuel Air : Automotive