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