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 in Fitting Side B Tube Outer Diameter 1/2 in Material Grade 316 Maximum Operating Temperature 649 Degrees C Overall Length 2 3/8 in Specific Fitting Shape Straight Reducing Connector Compatible Fitting Brands A-LOK Thread Size A 1 5/16-20 Thread Size B 3/4-20