M12 x 1.5 metric Male Oring boss to 1/8 npt female adapter - JBtuned
M10x1.0 to M12x1.0 Fitting Male Union Coupler Adapter M10-M12
Amazon.com: Metric M12 M12X1.5 Female to 3/8" Male NPT Pipe Fitting Gauge Adapter : Industrial & Scientific
American Grease Stick Co. Brass Adapter, 3/8"-24 Inverted to M12 x 1.0 Bubble BLF-33C - Advance Auto Parts
Adapter M10 x 1 & M12 x 1 for Trasmet. 1/8 " - Indicators and Instruments FARIA INSTRUMENTS - MTO Nautica Store
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 GS5000C - M12 Metric to 3/8 Adapter
Amazon.com: Pipe NPT 3/8" Female X Metric M12 M12X1 Male Adapter Fitting Fuel Air