Instrumentation Fittings Application Gases Hydraulic Fitting Connection Type Compression Fitting Material Stainless Steel Fitting Tube Size Outer Diameter 3/8 in Material Grade 316 Maximum Operating Pressure 3326 psi Maximum Operating Temperature 1 200 Degrees F Specific Fitting Shape Cap System of Measurement Imperial Compatible Fitting Brands Parker A-LOK Swagelok Fitting Thread Size 9/16-18 Series Brennan Instrumentation Standards ASME B31.3-2002 ASTM A269-04 ASTM F1387