Union Reducer, Fitting Material Brass, Flare Angle 45 Degrees , Application Natural Gases, LP Gases, Fitting Side A Connection Type Flared, Fitting Side B Connection Type Flared, Fitting Side A Tube Outer Diameter 1/2 in, Fitting Side B Tube Outer Diameter 3/8 in, Fitting Thread Size 5/8-18, Hex Size 3/4 in, Maximum Operating Pressure 750 psi, Maximum Operating Temperature 250 Degrees F, Overall Length 1 21/32 in, Specific Fitting Shape Straight Reducing Connector, Standards SAE J512, SAE J513