Press Adapters Application Natural Gas Non-Potable Water Propane Fitting Side A Connection Type Press-Fit Fitting Side B Connection Type MNPT Fitting Side A Copper Tube Size 1/2 in Fitting Side B Copper Tube Size 3/8 in Fitting Material Copper Fitting Side B Pipe Size 3/8 in O-Ring Material HNBR Specific Fitting Shape Straight Adapter Fitting Side A Tube Outer Diameter 1/2 in Fitting Side B Tube Outer Diameter 3/8 in Overall Length 1 17/32 in Maximum Operating Pressure 200 psi