Union Application Air Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Brass Fitting Side A Tube Outer Diameter 5/8 in Fitting Side B Tube Outer Diameter 5/8 in Maximum Operating Pressure 150 psi Maximum Operating Temperature 250 Degrees F Overall Length 3 7/32 in Specific Fitting Shape Straight Union Thread Size A 13/16-18 Thread Size B 13/16-18 System of Measurement Imperial Standards DOT SAE Compatible Tube Material Copper