Union Application Fuel Oils Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Brass Fitting Side A Tube Outer Diameter 3/8 in Fitting Side B Tube Outer Diameter 3/8 in Maximum Operating Pressure 225 psi Maximum Operating Temperature 275 Degrees F Overall Length 1 1/2 in Specific Fitting Shape Straight Connector Series Vibra-Lok System of Measurement Imperial Standards ISO 6149 SAE J1926