Reducing Union Application Gases Liquids Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Stainless Steel Fitting Side A Tube Outer Diameter 1/2 in Fitting Side B Tube Outer Diameter 3/8 in Material Grade 316 Maximum Operating Pressure 10 000 psi Maximum Operating Temperature 1 200 Degrees F Overall Length 1 29/32 in Specific Fitting Shape Straight Reducing Connector Compatible Fitting Brands CPI Thread Size A 3/4-20