Steel tube fitting Application Gases Oils Fitting Side A Connection Type Compression Fitting Side B Connection Type NPT Fitting Material Steel Fitting Side A Tube Outer Diameter 18 mm Maximum Operating Pressure 4 568 psi Overall Length 40 mm Specific Fitting Shape 90 Degrees Elbow Adapter Fitting Side B Pipe Size 1/2 in Thread Size B 1/2-14 Series Ermeto DIN System of Measurement Metric