Tube End Insert Application Air Natural Gas Potable Water Propane Steam Compatible Fitting Connection Type Compression Compatible Tube Outer Diameter 1/2 in Compatible Tube Inner Diameter 3/8 in Finish/Coating Unpolished Fitting Material Stainless Steel Material Grade 316 Maximum Operating Pressure 6 700 psi Maximum Operating Temperature 1 200 Degrees F Overall Length 5/8 in Specific Fitting Shape Tube Insert System of Measurement Imperial Standards ASTM 31.3