Parker 68ALS-12M-8 Autoline Push-to-Connect Fitting, SAE J2044 to Pipe, Brass, Male SAE J2044 and NPTF Straight, 12 mm and 1/2": Amazon.com: Industrial & Scientific
PARKER, Steel, 12 mm x 1/4 in Fitting Pipe Size, Straight - 60VA69|M12-1/4F8OHGS - Grainger