JEGS 63074: Mechanical Temp Gauge Adapter Fitting M12 x 1.5 Male x 3/8 NPT Female Straight - JEGS
Swap Coolant Temperature Sensor Water Adapter Male M12 1.5 - Female 3/8 NPT - Walmart.com
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
Brass Metric M12 x1.75 M12X1.75 Male to 3/8" Hose ID Barb Fitting Adapter
Gitzo M12 to 3/8'' adapter - GS5000C | Gitzo US
BAMILL M6-M12 Tap Holding Chuck 3/8 Adapter Tap Wrench Adjustable Clamping Tap Chuck - Walmart.com
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
Gitzo Disk Adapter (M12 to 3/8") GS5000C B&H Photo Video
Adapter M10 x 1 & M12 x 1 for Trasmet. 1/8 " - Indicators and Instruments FARIA INSTRUMENTS - MTO Nautica Store
ICT Billet F375NPFM1215 - 3/8" NPT Male to M12-1.5 Female Coolant Temp Sensor Adapter Fitting