Union Application Air Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Brass Fitting Side A Tube Outer Diameter 3/8 in Fitting Side B Tube Outer Diameter 3/8 in Maximum Operating Pressure 150 psi Maximum Operating Temperature 250 Degrees F Overall Length 2 21/32 in Specific Fitting Shape Straight Union Thread Size A 17/32-24 Thread Size B 17/32-24 System of Measurement Imperial Standards DOT SAE Compatible Tube Material Copper