Push-to-Connect HVAC Fitting Fitting Side A Connection Type Push-Fit Fitting Side B Connection Type UNF Fitting Side A Pipe Size Not Applicable Fitting Side B Pipe Size 5/8 in Fitting Side A Tube Outer Diameter 3/8 in Fitting Side B Tube Outer Diameter Not Applicable Fitting Material Brass Fitting Thread Size 5/8-18 Maximum Operating Pressure 870 psi Maximum Operating Temperature 250 Degrees F Overall Length 1 5/8 in Specific Fitting Shape Flare Adapter